engine rebuilding final
What would be a typical compression ratio for an Otto-cycle Engine?
9:1
When an oil is tested at 0 deg. F, what letter would appear in the viscosity listing on the oil container.
w
__________________ in the thermostat expands to cause it to open.
wax
How far into the block are cup-type core plugs installed?
when the lip is just past the chamfer
Racing cams have been around for a while who is sometimes referred to as the father of racing cams?
Ed Winfield
When there is less clearance, will a Plastigage reading be wider or narrower?
wider
Glass beads are safe to use for cleaning because if they get into the oil they will not cause any damage.
False
It is OK to use the nozzle of the bead blaster to clean the glass off.
False
It is recommended to do a compression test with all the spark plugs in. True or false
False
Knurling a valve guide is recommended on guides worn over .007in clearance.
False
Magnuflux is a method of crack detection for aluminum heads.
False
On a metric ruler hundredths are called millimeters
False
Solvents are used to make liquids into solid waste for disposal.
False
To clean an over head cam cylinder head the glass bead is the best way
False
When working on a OHC cylinder head with the cam installed it is not a problem to set the head on the bench gasket gasket surface down.
False
When a battery is being charged it gives off ____ gases
Hydrogen
When are O-ring guide seals installed?
In groove after spring is compressed
What process is used at the factory to harden the integral valve seats?
Induction heating
What type of threads are usually found in gallery plugs?
NPT
Micrometers are being discussed.Tech A says each complete revolution of the thimble is 0.040" Tech B says each line on the barrel equals 0.25" . Who is correct?
Neither
Restoration technician A says gasoline is a better choice for cleaning material than ordinary Stoddard solvent because it is safer to use. Restoration technician B says that hot pressure washing uses boiling water to clean parts. Who is correct?
Neither
Restoration technician A says it is usually easier to remove an engine with an automatic transmission attached to the engine on a rear wheel drive car. Restoration technician B says to always disconnect the positive battery cable first on a negative ground battery system. Who is correct?
Neither
Restoration technician A says that "blowby" is composed of gases that leak past valves. Restoration technician B says a block assembly without cylinder heads just called and long block. Who is correct?
Neither
Restoration technician A says the purpose of the flywheel is to control the twisting of the crankshaft. Restoration technician B says the purpose of a vibration dampener is to help provide a continuous flow of power. Who is correct?
Neither
Restoration technician A says the ring ridge will never have to be removed if the piston can come out of the block easily. Restoration technician B says the ring ridge must be removed or the piston will not be able to be removed from the engine. Who is correct?
Neither
Restoration technician A says to use coarse sandpaper when cleaning bimetal machine services. Restoration technician B says Scotch Bright discs are popular and best for use on aluminum surfaces. Who is correct?
Neither
Restorer A says that valve seals need to be installed on exhaust valves only. Restorer B says that even if two seals look alike some might be made of rubber that will survive longer under high temperature. Who is correct?
Neither
Two technicians are discussing government regulations. Tech A says OSHA is responsible for protection from hazardous materials. Tech B says the EPA protects workers from work place hazards. Which tech is correct?
Neither
If you rev the engine there is a roar in the intake manifold what is this typically an indication of?
Restricted Exhaust
What does SAE stand for?
Society of Automotive Engineers
What are bulletins that are produced by manufacturers and associations called?
TSB'S
Sometimes lifters are called?
Tappets and Cam Followers
1000cc of water weighs 1kilogram.
True
A digital caliper with an LCD measures to an accuracy of 0.0005"
True
Arc welding produces ultraviolet rays that can be harmful to eyes.
True
Before using a valve spring compressor you can use a short piece of pipe and hammer to strike the spring retainer to break it loose
True
Before you refinish the valve seats you must finish the valve guides.
True
If the temperature of the cleaning liquid is too low, the cleaning time will be longer in a hot tank.
True
It is a good idea to drill a hole at each end of a crack when pinning so the crack does not get larger.
True
It is best practice to keep the valves in order when removing them from the head.
True
Measuring a valve guide with a split ball gauge is one way using a dial indicator is another.
True
Pinning or stitching a crack is a good way to repair a cast iron head.
True
Pressure testing a cylinder head is a great way to test both aluminum and cast iron heads.
True
The metric system is based on units of ten.
True
The most common injuries in shops involve backs and eyes
True
Umbrella, O-ring and Positive seals are the three basic types of valve guide seals however they can come in different materials depending on the application
True
Using the hammer and pipe to knock loose the retainer could bend the valve stem if not careful.
True
VSI shims are available in .015",.030"and .060" sizes.
True
Valve guides wear in a bell mouth shape
True
Vehicle exhaust gases contain Carbon Monoxide that is colorless odorless and can be fatal.
True
knurling the valve guide is a inexpensive way to repair a valve guide
True
What under sizes are crankshafts be ground to?
.010", .020", .030"
When a cylinder is bored 0.030" oversize, how much metal is removed from the surface of the cylinder wall?
.015"
When measuring the voltage of coolant, what is the limit before the system should be flushed out?
.5 volts
What is the approximate width of an intake valve seat?
0.060in
What is the approximate width of an exhaust valve seat?
0.080 in
How much interference is a cylinder sleeve installed with?
.0005" per inch of bore
What is the maximum amount of bore taper allowed on cylinders using conventional cast iron rings?
.005"
How much thicker than standard would a 0.020" undersize bearing shell be?
.010"
If the valve has to be ground to much the margin gets thin, the margin has a minimum measurement for this thickness what is that dimension?
1/32
The lubrication system should be able to produce a minimum of _________ psi for each 1000 rpm.
10
How many degrees is a connecting rod journal offset on an in-line six?
120
If an engine idles at 20 inches of vacuum at sea level and then is driven to Denver the mile high city what would be expected vacuum be idle?
15 in
How many degrees is it connecting rod journal offset on an in-line four-cylinder?
180
The best cleaning temperature of a hot tank solution would be about?
190 F
Corrosive wastes have a pH level lower than ____ or higher than ____.
2 - 12.5
Common automotive presses can be dangerous because they can develop ____ tons of pressure.
20-40
What would a typical compression ratio be for a compression ignition engine?
20:1
How many inches of vacuum should the engine have minimum while cranking with the throttle closed?
3 in
A car has oil smoke from its exhaust during deacceleration. Restoration technician A says that bad valve guide seals could be the cause. Restoration technician B says that worn piston rings could be the cause. Who is correct?
A
For each Pound of pressure on the coolant, how much will its boiling point be increased?
3degF
How many camshafts does a DOHC V6 have?
4
How many compression strokes minimum should into be cranked during the compression test?
4
What kind of socket would be used to remove a male gallery plug?
4 or 8 point
An engine has excessive valve guide wear. Restorer A says to ream the guide and install a new valve guide with an oversize stem. Restorer B says to knurl the valve stem and reinstall it in the guide. Who is correct?
A
Restorer A says that after the 45deg valve seat has been refinished smooth, a 30deg angle should be used to position the valve seat. Restorer B says that before the valve guide is repaired the valve seat should be ground. Who is correct?
A
In a 12-cylinder Ferrari engine how many degrees does the engine turn to complete the firing of all 12 cylinders?
720
During an inspection of a V8 engine that has recently had a valve job, oil and manifold leaks are found on the valley side of the head. Restorer A says this problem could be caused from the .025in removed from the cylinder head when it was resurfaced and manifold was not resurfaced. Restorer B says it is due to bad valve guide seals. Who is correct?
A
How many degrees is the connecting rod journals offset on a V8?
90
In a four stroke, eight-cylinder engine how many degrees must a crankshaft turn before the next cylinder in the firing order is fired?
90
Measurements are being discussed. Tech A says a magnifying glass is sometimes helpful when reading a vernier scale. Tech B says 24.5 mm equals one inch. Which tech is correct?
A
Metric micrometers are being discussed. Tech A says the hub is graduated in millimeters and half millimeters. Tech B says each revolution of the thimble equals one millimeter on the hub. Which tech is right?
A
Restoration technician A Says that the bake and blast procedure is better than a hot tank. Restoration technician B Says that the hot tank is better than the bake and blast procedure.
A
Restoration technician A says an in-line six-cylinder engine is usually longer and heavier than a V-8 engine of the same power. Restoration technician B says there are twice as many teeth on the crankshaft sprocket as on the camshaft sprocket. Who is correct?
A
Restoration technician A says and I head Engine is widely used in the automobile because it can breathe better than L head engine. Restoration technician B says that and L head engine can have higher valve lift and higher compression than would be possible for an I head engine. Who is correct?
A
Restoration technician A says even if the fuel is not leaking from the fuel line when disconnected it should be plugged. Restoration technician B Says if fuel is not leaking from the fuel line it is a waste of time to plug it. Who is correct?
A
Restoration technician A says it is a good idea to remove the pan before rotating an engine upside down to keep the sludge from pouring in to the top of the engine and making it dirtier to disassemble. Restoration technician B says is it is easier to turn the engine upside down to remove the pan and a waste of time to remove it before turning the engine upside down. Who is correct?
A
Restoration technician A says steel shot blasting is commonly used to clean Ferris parts. Restoration technician B says steel shot blasting is commonly used to clean aluminum parts. Who is correct?
A
Restoration technician A says stroke is the movement between top dead center and bottom dead center. Restoration technician B says stroke is determined by the length of rod. Who is correct?
A
Restoration technician A says that It is important to keep lifters in order if they are to be used again. Restoration technician B says that it is not important to keep the lifters in order. Who is correct?
A
Restoration technician A says that a cylinder leakage test is better than a compression test for testing the condition of an engine before installing it in a car. Restoration technician B says that a compression tester is better than a cylinder leakage tester for testing the condition of any engine with a performance camshaft. Who is correct?
A
Restoration technician A says that a hot spray washer is commonly called a jet washer. Restoration technician B says a spray washer is heated to 212 degrees Fahrenheit. Who is correct?
A
Restoration technician A says that a valve opens 50 times a second at 6000 RPM. Restoration technician B says that no automotive valve can open 50 times a second. Who is correct?
A
Restoration technician A says that and excessive lean mixture can cause burned internal parts such as valves and pistons. Restoration technician B Says that a lean mixture can dry rub the cylinder walls. Who is correct?
A
Restoration technician A says that during engine disassembly all main and rod bearings should be kept in order in case they will need to be reused. Restoration technician B says there is no need to keep the bearings in order if new parts are to be used. who is correct?
A
Restoration technician A says that the bake oven is used before the shot blaster. Restoration technician B says the shot blaster is used before the bake oven.
A
Restoration technician A says that vacuum readings for an engine with a performance camshaft will be lower at idle Restoration technician B in engine that has worn lower main bearings will have lower oil pressure at freeway speeds. Who is correct?
A
Restoration technician A says that when using a flare nut wrench two wrenches must be used. Restoration technician B says to use an open-end wrench on fuel line fittings to brake them loose. Who is correct
A
Restoration technician A says the Otto cycle gasoline engine has four strokes per cycle. Restoration technician B says the crankshaft makes four revolutions during the four-stroke cycle. Who is correct?
A
Restoration technician A says the camshaft turns half as fast as the crankshaft. Restoration technician B says the camshaft turns twice as fast as the crankshaft. Who is correct?
A
Restoration technician A says the ground wire from the engine to the firewall is very important and is sometimes forgotten when removing an engine and installing an engine. Restoration technician B says that this ground wire is irrelevant. Who is correct?
A
Restoration technician A says to use an air impact wrench to remove rusted exhaust nuts. Restoration technician B says, when installing a flywheel ring gear, heat it until it is red hot. Who is correct?
A
Restorer A says an overhead cam head can have the clearance adjusted sometimes before the head is installed Restorer B says overhead cam engines need to be running to adjust valve clearance.
A
Restorer A says that a tapered, threaded plug is a method of repairing a crack. Restorer B says that before doing this the head must be welded on each end of the crack. Who is correct?
A
Restorer A says that narrow valve seats are desirable because they exert a higher force on the seat area. Restorer B that if the intake and exhaust valve springs are of equal pressure, then the larger exhaust valve must have a narrower seat than the larger intake valve in order for them to have the same seating pressure. Who is correct?
A
Restorer A says that stem-to-guide clearance can be measured with a dial indicator. Restorer B says that a nice flat feeler gauge is the best tool for this measurement. Who is correct?
A
Restorer A says the basket type of coil springs are installed with the tighter part of the coil against the cylinder head. Restorer B says that grinding the valve seat will decrease the valve spring installed height. Who is correct?
A
Technician A says a vernier caliper can measure inside diameter, outside diameter and also depth. Technician B says measurements in auto industry are commonly made in hundredths of an inch. Who is right?
A
Two restorers are discussing jack safety. Restorer A says to always use safety stands when using a floor jack. Restorer B says the center of gravity of a vehicle is not important when raising a vehicle with a unibody. Which tech is correct?
A
Two restorers are discussing the interference angle. Restorer A says that it helps a reground valve to seat because it causes increased valve seat pressure. Restorer B says that a 1deg difference between the valve face and seat angles is enough to cause the valve to leak and burn
A
Two restorers are discussing the ring ridge on the top of the engine. Restoration technician A says that the ridge forms at the top of the cylinder due to lack of lubrication. Restoration technician B says that the ridge forms because during the combustion, pressure of the top ring pushes metal up the cylinder wall. Who is correct?
A
Wood burning wood is classified as a class_______ fire.
A
A valve guide has .015 of bell mouth wear. Restorer A says to knurl and ream the guide back to size. Restorer B says to repair the guide with a replaceable guide insert. Who is correct.
B
An eight-cylinder engine has a 18436572 firing order. Restoration technician A says that cylinder number 3 is cylinder number 1's companion. Restoration technician B says that cylinder number 5 is the cylinder number 8's companion. Who is correct?
B
Restoration technician A Says bolts that attach a cable to or chain to lift an engine should be installed at a depth of four times the diameter of the bolt . Restoration technician B says The bolts that attach a cable or chain to lift an engine should be installed 1 1/2 times the diameter of the bolt.
B
Restoration technician A Says that if core plugs are carefully removed, they can be reused again. Restoration technician B Says that if core plugs are removed, they must be replaced they cannot be reused again. Who is correct?
B
Restoration technician A says a complete engine is often before referred to is a short block. Restoration technician B says a complete engine block and heads is often referred to as long block. Who is correct?
B
Restoration technician A says all engines must have a vibration damper. Restoration technician B some engines do not use the vibration damper. Who is correct?
B
Restoration technician A says that a compression test can be used to tell the condition of the oil control rings. Restoration technician B says that when several cylinders have low compression test readings, it is likely due to burnt valves. Who is correct?
B
Restoration technician A says that a freewheeling engine is one that does not slow the engine down when decelerating. Restoration technician B says a freewheeling engine is an engine if there is a failure in the timing chain or timing mechanism the piston will not make contact with the valve
B
Restoration technician A says that air conditioner lines should be opened slowly and allowed to vent in a controlled manner. Restoration technician B says that the air conditioning system should be properly drained with a recycling unit before opening the lines and not allowing gases to escape into the atmosphere. Who is correct?
B
Restoration technician A says that aluminum can be dropped into a caustic cleaning tank without an issue. Restoration technician B says that aluminum should not be put in a caustic cleaning tank. Who is correct?
B
Restoration technician A says that cylinder heads are more easily removed after warming up the engine. Restoration technician B says that to avoid warping the head, the engine must be cold before removing it. Who is correct?
B
Restoration technician A says that it is not necessary to put any kind of protection on the rod bolts during disassembly. Restoration technician B says that it is important to use a rubber hose or a rod protector cap over the rod bolts during disassembly. Who is correct?
B
Restoration technician A says that the flat rate manual is the only way to fairly bill mechanical repairs on a restoration project. Restoration technician B says that because You are dealing with an old car with many unknowns the flat rate guide however, not useless, is merely a guide for the time it might take to do a particular mechanical repair. Who is correct?
B
Restoration technician A says the vibration dampener is removed with a puller that grasps the dampeners outer ring. Restoration technician B says that when an air impact wrench is used on a puller to remove the vibration dampener, the crankshaft need not be kept from turning. Who is correct?
B
Restoration technician A says water is the best thing to use to put out a gasoline fire. Restoration technician B says carbon dioxide or dry chemical fire extinguisher is the best to put out a gasoline fire.
B
Restorer A says Magnaflux is the trade name for the crack detection method that is used on aluminum cylinder heads. Restorer B says that a cylinder head surface can be too smooth and cause a head gasket to leak. Who is correct?
B
Restorer A says a reamer is the best way to resize a bronze guide. Restorer B says a guide hone is the best way to resize a bronze valve guide. Who is correct?
B
Restorer A says that oil consumption will always increase past the rings after a valve job. Restorer B says that oil consumption on low mileage engines can often be traced to valve guide seals. Who is correct?
B
Tech A says micrometers are used primarily to measure inside diameters.Tech B says telescoping gages are used with micrometers to measure cylinders and bearing bores. Which right?
B
If a spark plug has carbon deposits on only one side what could possibly be the cause?
Bad Valve Seals
A noise occurs at one half engine RPM. Restoration technician A says this could be a bad lifter Restoration technician B says this could be a valve that needs adjusted. Who is correct?
Both
An engine has a crack between a water jacket and an oil galley. Restoration technician A says that oil will go into the cooling system when the engine is running. Restoration technician B says that coolant can go into the oil when the engine is off. This correct?
Both
An engine has a late valve timing. Restoration technician A says this will cause poor, low RPM performance. Restoration technician B says that, at higher RPM Engine performance might be acceptable. Who is correct?
Both
An engine has excessively worn exhaust guides. Restorer A says to look for weak or short valve springs. Restorer B says this can cause excessive crankcase pressure. Who is correct?
Both
Personal safety is being discussed. Restorer A says to always wear eye protection when using a blow gun. Restorer B says to always wear face protection when using the grinder. Who is correct?
Both
Restoration technician A says a flywheel is used to store energy to carry the engine through the next stroke. Restoration technician B a flywheel provides a surface for the clutch face to ride. Who is correct?
Both
Restoration technician A says a model A Ford is an L head engine. Restoration technician B says a model T Ford is an L head engine. Who is correct?
Both
Restoration technician A says an engine that idles rough due to burn valves can run fine at speeds above idle. Restoration technician B says the carbon buildup in the combustion chamber and cause the engine to have higher compression. Who is correct?
Both
Restoration technician A says that an .040 on the top of a piston would mean the engine has been bored .040 of an inch. Restoration technician B says that a piston with STD or no markings marked on the top indicates the engine has likely not been bored. Who is correct?
Both
Restoration technician A says that bad valve guide seals can result in excessive carbon built up on the backside of the valve. Restoration technician B says that the washed spot on the top of the piston just above the intake valve is also an indication of valve guide seals.
Both
Restoration technician A says that compressed air can penetrate the skin, caution needs to be used when using a blow gun. Restoration technician B says to stand aside when turning on a grinder wheel in case it would happen to explode
Both
Restoration technician A says that the VIN number used by the manufacturers is used to identify a particular vehicle and can be valuable in tracing the history of the car. Restoration technician B says that the 8th digit of the VIN number at least on a modern VIN can indicate the engine code. Who is correct?
Both
Restoration technician A says that the bake and blast procedure will remove rust and scale. Restoration technician B says that the bake and blast procedure will remove grease and grime. Who is correct?
Both
Restoration technician A says that the intake and exhaust valves are both closed during the power stroke. Restoration technician B says that the intake and exhaust valves are both closed during the compression stroke. Who is correct?
Both
Restoration technician A says that to turn a crankshaft it is acceptable to use a nice wide Crescent wrench wedged against the crank key. Restoration technician B says that another option would be to use a special tool that fits over the snout of the crankshaft. who is correct
Both
Restoration technician A says the battery charger should be shut off before disconnecting the battery cables. Restoration technician B says Hydrogen above a battery can cause an explosion when disconnecting battery cables.
Both
Restoration technician A says the mushroomed end of a punch should be dressed up before using it. Restoration technician B says safety glasses are very important when using a punch.
Both
Restoration technician A says the ultrasonic cleaner is good for cleaning small parts such as carburetors. Restoration technician B says the parts tumbler is a good way to clean medium sized greasy parts. Who is correct?
Both
Restoration technician A says to remove all oil galley plugs before hot tank cleaning. Restoration technician B says to clean all oil galleys with a brush following hot tank cleaning. Who is correct?
Both
Restorer A says that incorrect cam spacer can cause the ignition timing to fluctuate. Restorer B says that the timing chain slack can be verified on a push rod engine by watching the distributor movement when turning the crank shaft each direction. Who is correct?
Both
Restorer A says that the valve seating pressure is the amount of force the valve spring exerts on the area of contact between the valve face and seat. Restorer B says that the integral valve seats in late model cast iron heads are harder than the iron in the rest of the head.
Both
Restorer A says that the valve spring's pressure may be 10% less than the manufacturers specifications before it must be replaced. Restorer B says rust on the valve spring can affect its spring tension and should be replaced.
Both
Restorer A says the valve face should overhang slightly into the combustion chamber when the valve is closed. Restorer B says that the throat angle can be over ground and ruin the valve seat. Who is correct?
Both
Restorer A says to grind less than 0.020in form the tip of the valve stem to avoid grinding through the hardened area. Restorer B says the tip should be ground approximately the same amount as was removed from the valve face and seat to retain valve stem installed height specification
Both
Restorer A says to never open a radiator cap if the upper hose is hard. Restorer B says to always safety check a car before driving it. Which tech is correct?
Both
Tech A says a small hole gauge is also referred to as a transfer gauge. Tech B says the small hole gauge is used on valve guides. Who is correct?
Both
Tech A says one advantage of micrometers is with a little practice they are clear and easy to read. Tech B says micrometers are consistent and accurate. Which tech is right?
Both
Tech A says the threads on the micrometer spindle have 40 threads per inch. Tech B says one complete turn of the micrometer thimble moves the spindle 0.025". Who is correct?
Both
Technician A says a micrometer may have a digital readout. Technician B says a micrometer may have a decimal equivalent chart stamped on it. Which technician is correct?
Both
Two restorers are discussing shot peening Restoration technician A says that the larger shot hits the part with more impact. Restoration technician B says that the parts can actually be made stronger by shot peening. Who is correct
Both
Two restorers are discussing solvents. Restorer A says chlorinated solvents are not flammable. Restorer B say that chlorinated solvents when exposed to a flame can produce phosgene gas. Who is correct?
Both
Two technicians are discussing compression test results Restoration technician A says that low compression in adjacent (neighboring) cylinders indicates a bad head gasket. Restoration technician B says that if the reading on the compression tester goes up after adding oil to the cylinder, the compression rings are probably worn. Who is correct?
Both
Two technicians are discussing the part installed on the front of the crankshaft to control its twisting. Restoration technician A says it is called a vibration damper. Restoration technician B says it is called a harmonic balancer. Who is correct?
Both
Hazardous materials can enter the blood stream by
Breathing Eating Skin penetration (All of the above)
An electrical fire is classified as class ____
C
What happens to the outside of an exhaust pipe at the point of an internal restriction?
Color Change
What is the ratio called that compares the volume of the airspace above the piston at TDC and at BDC?
Compression ratio
Engine noise goes away when the spark plug wire for one cylinder is disabled. What could this noise be?
Connecting Rod
All of the below are dial indicator facts except.
Continuous-counterclockwise Balanced Continuous-clockwise Contiguous <====
Which valve would most likely have a hardened tip?
Exhaust
A base is very acidic
False
A inline 6 engine might be allowed .006in of warp however a V8 engine might be allowed .008in of warp.
False
An overhead Cam engine cylinder head is ideal to be cleaned with glass beads.
False
Dye penetrant is a method of crack detection is mostly used on cast iron heads.
False
If a hot spray cleaner is run when the cleaning temperature is not high enough, what can happen to the cleaning solution?
It can foam up
If sludge forms in a modern engine what additive is probably depleted?
detergents
What should be done to machined areas of ferrous metal after hot tanking?
Light Oiling
When is spark plug is disabled and the noise becomes louder, what could this be?
Piston Pin
How can metal be tested to see if it is ferris or nonferrous.
With a magnet
When there is no clearance between the valve stem and its actuator, this is known as?
Zero lash
A block from an early 1970s car has 0.012" of bore taper. Restorer A says to rebore to oversize and use new pistons and rings. Restorer B says to use 0.010" oversize rings. Who is correct?
a
Piston ring gap is being discussed. Restorer A says .003 in. - .004 in. per inch of engine bore is typically the correct ring gap. Restorer B says these numbers do not matter, as the rings do not need to be checked if they are new. Which restorer is correct?
a
Restorer A says oil gallery plugs and heater hose connections will have NPT threads. Restorer B says that a 3/8 to ¼ socket adapter is used when removing oil gallery plugs. Who is correct?
a
Restorer A says some replacement pistons can be shorter by 0.020". Restorer B says this will not affect the compression ratio. Who is correct?
a
Restorer A says that a fan is not necessary at freeway speeds. Technician B says that the fan is supposed to push air through the radiator. Who is correct?
a
Restorer A says that a pressed-fit cylinder sleeve usually has an I.D. that is smaller than the original bore size. Restorer B says to clean the block thoroughly with solvent after honing. Who is correct?
a
Restorer A says that bearings have a soft surface that flows away from the high spots in case of a nick in the crank. Restorer B says dirt can be absorbed into the crankshaft journal surface. Who is correct?
a
Restorer A says that cast crankshafts have larger counterweights than forged crankshafts. Restorer B says that forged crankshafts are usually external balanced with weights on the torque converter and damper. Who is correct?
a
Restorer A says that detergents keep small particles suspended in the oil so that the filter can clean them out. Technician B says the detergents clean the surfaces within the engine. Who is correct
a
Restorer A says that oil pressure that fluctuates from high to low can be caused by a sticking pressure relief valve. Restorer B says a stuck closed-closed pressure relief valve will result in high oil pressure at idle at normal operating temperature. Who is correct?
a
Restorer A says that the amount of cylinder bore taper can be determined using a piston ring and feeler gauge and a little math. Restorer B says the greatest out-of-round wear will occur at the wrist pin ends of the piston. Who is correct?
a
Restorer A says the piston skirts are cam ground to control expansion. Restorer B says piston skirts have slipper skirts to control expansion. Who is correct?
a
Two old restorers on a late Friday night are discussing chamfering the top of a recently rebored and honed cylinder bore. Restorer A says to use a special cone sander or a special cutter in the boring bar Restorer B says chamfering the cylinder is unnecessary. Who is correct?
a
Two restorers are attempting to locate a leak by using a pressure tester on the radiator. Restorer A says to use a mirror and a flashlight to locate the leak location cannot be seen. Restorer B says to run the engine when performing the test. Who is correct?
a
An engine that all of the exhaust valves are bent is being discussed Restorer A says this is due to a broken timing belt Restorer B says this could be form excessive chain slack or improper cam timing. Who is correct?
b
Restorer A says a cracked cylinder bore cannot be repaired. Restorer B says when finish honing after boring, stroking the hone too far out of the top of the cylinder bore can produce a taper that is hard to correct. Who is correct?
b
Restorer A says a valve lifter on a pushrod engine must be perfectly centered above its corresponding cam lobe. Restorer B says a push rod engine cam lobe is slightly tapered across its face. Who is correct?
b
Restorer A says cast pistons run cooler than forged pistons. Restorer B says that installing a compression ring upside down can cause oil consumption. Who is correct?
b
Restorer A says normal main bearing wear is on the top Restorer B says that excessive worn lower main bearings can be caused by lugging the engine. Who is correct?
b
Restorer A says that 0.010" of material is removed on the surface of a 0.010" crank. Restorer B says that 0.015" material is removed from a 0.030" crank. Who is correct?
b
Restorer A says that all piston pins are offset from the centerline of the piston. Restorer B says that piston pins being pressed-fit in the connecting rod is a common method. Who is correct?
b
Restorer A says that bearing spread is when the insert extends above the parting surface. Restorer B says that crush is what keeps the bearing from spinning in the bearing bore. Who is correct?
b
Restorer A says that full-floating, piston pin lock rings should be installed with their openings facing up. Restorer B says that the top compression ring groove usually suffers more wear than the other ring grooves. Who is correct?
b
Restorer A says when replacing a thermostat, the temperature sensing bulb faces out of the block. Restorer B says the engine with the aluminum heads should use antifreeze with special silicate additives. Who is correct?
b
Rings are being installed. Restorer A says that the top two rings are the same and it just matters that they are installed with the top indicator up. Restorer B says that the top and second rings are usually different. Which restorer is correct?
b
When a rod journal measures tapered what should be checked as a possible cause?
bent rod
A crank has been ground to 0.010 - 0.020. Restorer A says the 0.020 represents the rod journal. Restorer B says the 0.010 represents the main size. Who is correct?
both
A transmission heat exchanger has failed. Restorer A says if the engine is running, oil will flow from the transmission to the radiator. Restorer B says that when the engine is off cool flow into the transmission. Who is correct?
both
An engine has a burned thrust main bearing. Restorer A says this can be caused by a driver who "rides" the clutch. Restorer B says this can be caused by insufficient clutch pedal-free travel. Who is correct?
both
Pistons are being installed. Restorer A says that the pistons usually have a front and back and there is usually an arrow or a mark that faces the front. Restorer B says that the specification from the piston manufacturer supersedes the specification from the factory regarding piston fitment for skirt clearance. Which restorer is correct?
both
Restorer A says a piston skirt can he knurled to make it larger in diameter. Restorer B says that the darkened area on both sides of the ring gap indicates the use of rings that were too small for the cylinder's diameter. Who is correct?
both
Restorer A says an SAE 40 oil has lower viscosity than an SAE 20W-50 at engine operating temperature. Restorer B says that a 10W-40 multi viscosity oil reaches bearings faster than the engine is first started than a SAE 30 single viscosity oil. Who is correct?
both
Restorer A says an oil filter can bulge out if oil pump pressure relief valve sticks. Restorer B says a full flow oil filter will bypass some of the oil under cold running conditions or during high-speed operation. Who is correct?
both
Restorer A says an oil filter used in a bypass system can filter out smaller particles from than a full flow system. Restorer B says a full flow filter is mounted in a horizonal or inverted position requires an antidrainback valve. Who is correct?
both
Restorer A says camshaft end thrust results from resistance of the oil being pumped by the oil pump. Restorer B says the camshafts are usually inspected by visually checking for wear patterns on the lobes for edge loading. Who is correct?
both
Restorer A says engine vibration can resolved by installing the correct engine mounts. Restorer B says that the counterweights that are too light are drilled and filled with heavier material. Who is correct?
both
Restorer A says excessive hydraulic lifter pump-up can occur if the valves float. Restorer B says that the ideal valve adjustment on a hydraulic lifter positions the plunger in the center of its travel in the lifter body. Who is correct?
both
Restorer A says full flow oil filters have minimum resistance to oil flow compared to bypass filters and are not designed to filter out sludge. Restorer B says SA, or "nondetergent," oil should not be used in modern automobiles. Who is correct?
both
Restorer A says it is necessary to keep flat tappets in order if the old cam and lifters are to be used again Restorer B says it is not good to put used roller lifters on a new roller cam. Who is correct?
both
Restorer A says some piston rings have chamfers or reliefs cut in them causing them to twist. Restorer B says that chrome rings should not be used in out-of-round cylinders. Who is correct?
both
Restorer A says that a main bearing that has burned will often cause the main bearing bore diameter to become smaller in some places. Restorer B says main caps should be torqued in place before reboring the block. Who is correct?
both
Restorer A says that conventional piston rings wear the bore more than low-tension rings. Restorer B says low tension rings must have less cylinder bore taper than conventional rings. Who is correct?
both
Restorer A says that most four-cylinder engines do not use a damper. Restorer B says that a loose or damaged damper can break a crank. Who is correct?
both
Restorer A says that removing 0.015" of material from the cylinder wall will result in a bore that is oversized 0.030" larger. Restorer B says that a 0.030" oversized cylinder wall has a wall thickness that is 0.015" thinner than stock. Who is correct?
both
Restorer A says that some manufactures recommend against breaking the cylinder glaze with a glaze breaker when reringing an engine that has not been removed from the car. Restorer B says a flex hone is used to help break the cylinder glaze so the new rings can seat more easily. Who is correct?
both
Restorer A says that the coolant leaves the engine through the top radiator hose. Restorer B says that if cold water is added to a hot cooling system, the water pump could start to leak.
both
Restorer A says that the pressure cap can raise the boiling temperature of the coolant. Restorer B says that the small valve in the center of the radiator cap is the vacuum valve. Who is correct?
both
Restorer A says that the top grove in a piston can be checked for wear with a ring and a feeler gauge. The normal ring groove side clearance is 0.002"to 0.004" Restorer B says if a 0.006" feeler gauge fits when doing this test the groove is worn excessively and is not acceptable. Who is correct?
both
Restorer A says that when oil oxidizes it becomes heavier and forms varnish deposits. Restorer B says bypass oil filters are used in heavy-duty applications, primary to provide filtration in addition to a full flow filter. Who is correct?
both
Restorer A says that when the oil is cold and thick, it can bypass the oil filter. Restorer B says that when the oil filter is dirty and restricted, oil can bypass the filter. Who is correct?
both
Restorer A says the radiator cores are made of copper and brass. Restorer B says the radiator cores are made of aluminum and plastic. Who is correct?
both
Restorer A says too much oil pressure can cause excessive oil consumption. Restorer B says that viscosity goes up (oil becomes thicker) with lower temperatures. Who is correct?
both
Restorer A says valve lifters are sometimes called "tappets." Restorer B says that hydraulic lifters should leak very slowly between the plunger and the lifter body. Who is correct?
both
Where is the largest diameter of the piston found?
bottom of skirt
What is the passage that allows coolant to circulate within the block when the thermostat is closed?
bypass
What oil filter part would allow the oil to get to the bearings if the oil filter plugged?
bypass valve
What part of the engine usually drives the oil pump?
camshaft
With a mechanical lifter valvetrain the correct lash is important so the lifter hits the ______ ramp.
clearance ramp
What is another name for the rod journal?
crank pin
What is the name of the 20-60deg crisscross pattern left during cylinder honing?
cross hatch
When priming the oil pump the pump should be spun in the same direction that the _________ normally rotates.
distributor
What is the purpose of the gear on the camshaft on a pushrod engine?
drive the distributor
What is the camshaft term for number of degrees of travel that the valve is off its seat?
duration
When does most of the wear occur on an engine?
during start up
When a worn lifter face contacts the outside edge of the cam lobe causing severe wear, this is called?
edge loading
What is it called when an electrical current develops between two dissimilar types of metal in the cooling system?
electrolysis
As the oil pump in a pushrod engine is turned, resistance to pumping the oil causes the cam to be forced toward the rear of the engine what is this motion called?
end thrust
Two names for the part of the radiator that automatic transmission fluid flows through are the transmission oil cooler and the heat____________ .
exchanger
When a cam lobe wears out, which lobe will it most likely be?
exhaust
All of these are types of oil pumps except.
external gear internal/external gerotor ***volumizer***
Automotive coolant is a combination of ethylene glycol and sodium tricilicate.
false
Ethylene glycol is preferred to other coolants because it is safe for animals it they drink it.
false
If the lower part of the radiator is around 10deg F. colder than the to, the radiator it is likely plugged.
false
On a push rod engine valve lash will increase as the valves and seats wear
false
Piston clearance is the same on a cast piston as it is on a forged piston.
false
Taper can be measured by measuring the ring gap just under the ridge and recording this measurement, then measure the gap at the bottom of the cylinder and record this measurement. After this is done calculate the difference and multiply the difference by 3 this will give you the taper.
false
The shiny area that the rings rub on in a cylinder is called the polish.
false
To "rod out" a radiator the radiator shop will use a flexible rod inserted through the inlet and outlet where the hoses connect.
false
What tool do you use to check the piston ring end gap?
feeler gauge
Which crankshaft is stronger, cast or forged?
forged
What are two types of hardening?
gas nitriding and tuffriding
What causes oil oxidation?
heat
What is the tool that compares the density of water to that of coolant?
hydrometer
When removing an oil filter, position an oil filter wrench at the ______________ end of the filter.
inside
If an engine has a failure in the timing components and the pistons hit the valves, this would be known as what kind of engine?
interference
The difference between base circle and the top of the lobe would represent the amount of?
lift
What can be put on the O.D. of the bearing to make cam bearing installation easier?
light oil
When using the universal cam bearing installer, give the tool one hard rap to start the bearing into the bore. What should be done to the expanding mandrel before continuing?
loosen the mandrel 1/8 turn
Normal main bearing wear is on the ___________.
lower
After hot-tanking an engine block what should one do with all of the machined surfaces?
lube w light oil
Restorer A says a car overheats only on the freeway probably has a stuck closed thermostat. Restorer B says that the thermostat can be left out of the engine with no ill effects. Who is correct?
neither
Restorer A says cast pistons are stronger than forged pistons. Restorer B says that the full skirt piston used on a long stroke engine is called a "slipper" skirt. Who is correct?
neither
Restorer A says that if the cam is too tight after a new cam bearing are installed, the bearing can be sanded with emery cloth. Restorer B says the front cam bearing is always installed flush with the front of the block. Who is correct?
neither
Restorer A says that installing a thermostat with a lower temperature rating will help an engine run cooler in hot weather. Restorer B says that a stuck close thermostat can cause a computer-controlled fuel system to run rich. Who is correct?
neither
Restorer A says that stretched connecting rods often need resizing when the bearing clearance at the bearing parting line becomes excessive. Restorer B says normal connecting rod wear is on the cap end. Who is correct?
neither
Restorer A says that the "W" in SAE 10W-40 stands for "weight." Restorer B says that in-town driving is easier on the engine than driving the freeway. Who is correct.
neither
Restorer A says the lower radiator hose fails the most often Restorer B says 100% coolant will provide better cooling than a mixture of coolant and water. Who is correct?
neither
How much can a cylinder bore out of round if using a moly or a chrome piston ring?
none
Besides taper what other type of cylinder bore wear is there?
out of round
What is the term for the period of time when the intake and exhaust valves are both open?
overlap
When a very fine hone is used after the initial honing of a cylinder, this is called __________ honing.
plateau
What is the name of the part of the oil additive package that swells, allowing oil to maintain its viscosity as it heats up?
polymers
A ____________ displacement pump has a fixed output per revolution.
positive
What is the term for the pushrod engine with hydraulic lifter adjustment accomplished simply by torqueing the adjusting nut against a shoulder?
positive stop
What are the two most common methods of retaining a piston pin?
press fit or full floating
What is the name of the rounded area at the edge of each bearing journal?
radius
The hardness specification is usually given on the ___________ "C" scale.
rockwell
What is the name of the style of piston skirt that is cutaway on the sides to allow clearance for the crankshaft counterweights?
slipper skirt
What is the best API service classification for an automotive engine oil?
sm
________________ is one type of coolant additive that protects aluminum.
sodium silicate
What can happen to cylinders if they are rebored while the block is mounted on a conventional engine stand?
the bores might not be round
What is the term that describes the crankshaft being pushed forward by the clutch or torque converter?
thrust
Match the correct refinishing angles for a valve seat
top angle 30deg seat angle 45 deg throat angle 60deg
Which ring groove wears out the most?
top ring
The piston pin is offset in the piston and not in the center. Which way is it offset?
toward the major thrust side
A Restorer says a piston that is 0.030" over size piston weigh the same as an original standard piston but should be weighed to confirm this.
true
A decrease in lash can cause the valves to leak and over heat.
true
A restorer says the real danger of adding cold water to a hot engine is that it can crack the ceramic seal in the water pump.
true
Bob the restorer says "the three primary properties of a bearing that make it suitable for use would be embeddability, conformability, and fatigue strength".
true
If the lower part of the radiator is considerably colder at the bottom that the top the radiator is likely plugged
true
On a flat tappet pushrod engine, the cam lobe is tapered and the lifter is off center.
true
On a push rod engine valve lash will increase as the rocker arms and push rods wear.
true
Ring gap can be measured with a feeler gauge.
true
The difference in appearance between an inline engine rod journal and a V8 rod journal is that the V8 will be wider to accommodate two rods.
true
The slot behind the oil ring groove is to provide oil to be scraped off and returnd back to the crank case by way of the inside of the piston.
true
There a small hole in some thermostats to provide an air bleed that helps prevent an air lock in the cooling system.
true
What is the name of a piston that has a full skirt all the way around its bottom?
trunk
What is the name of the small valve in the center of the radiator pressure cap?
vacuum valve
What could low oil pressure at idle indicate?
worn main bearings, worn oil pump, worn cam bearings
A restorer was looking at a piston and noted that the diameter of the head or crown of the piston was smaller than the skirt diameter by at least 0.020". She claimed that this is correct, was she?
yes