Camshaft and Valve Train Components

Valve Float

A condition where the valve is momentarily thrown free from the direct influence of the cam lobe is referred to as what?

Apex

At what point on a cam lobe does maximum lift occur?

Steel

Both the crankshaft gear and the camshaft gear are made of what material?

Eccentric

Cam lobes have what type of shape?

Dial Indicator

Camshaft straightness or run-out should be checked with what?

Overhead Valve Engines

Engines with camshafts located in the cylinder block are referred to as what?

Back to Front

In what order should camshaft bearings be installed back into a block?

Dial Bore Gauge

Lifter bores should be measured with what?

Engine Timing

Maintaining the relationship between camshaft and crankshaft to properly control the opening and closing of the valves is called what?

Keep dirt out of the engine

Rocker housing covers are usually sealed with a gasket and designed to do what?

Backlash

The amount of "play" between two gears in mesh is referred to as what?

Slope

The cam lobe controls how fast a valve opens and closes due to what?

Lifter Cam Follower

The cam lobes eccentric shape is translated into reciprocating motion and transferred either to the push rod or directly to the rocker arm by what?

Two-Stroke

The camshaft gear is the same size as the crankshaft in what type of engine?

Four-Stroke

The camshaft gear is twice as large as the crankshaft gear in what type of engine?

Valve Train

The group of components that collectively function to open and close a diesel engines intake and exhaust valves

Camshaft Drive System

The group of components that takes power from the crankshaft and transfers it to the camshaft is known as what?

Piston Pin Bearing

The repair procedure for worn rocker arm bushings is the same as that for what item?

Cam Lobe

The signals for opening and closing the valves and for triggering the injectors.

Outside Micrometer

The simplest way to measure camshaft lobes for wear is to use what?

Top Dead Center

Typical valve adjustment for an OHV engine begins by positioning the number one piston at what location?

Solid

Valve lifters in most diesel engines are of what type?

Overflow oil from rocker arms

Valves and followers are generally lubricated by what?

Alloy Steel

What are camshafts made of?

Camshaft

What component synchronizes the operation of the valves and fuel injectors with the action of the pistons?

The duration angle of the cam lobe

What determines the amount of time the valve is open?

Thermal Expansion

What event necessitates a clearance between parts of the valve train?

Gear Train

What is a drive mechanism called when it consists only of gears?

Cylinder Block or Cylinder Head

What part of the engine may the camshaft be located?

Rocker Arm Ratio

When rocker arms are used to open the valves, the difference between cam lift and valve lift is known as what?

Finger Cam Followers

When the follower rides directly on the camshaft lobe and transmits cam motion directly to the valve, what type of follower is used?

Valve Lash

When the valves are properly adjusted, the small clearance between the valve stem and the end of the rocker arm is generally referred to as what?

Gear Ratio

When two mating gears have a different number of teeth, the number of times the driving gear turns for each revolution of the driven gear is known as what?

Crosshead

When two valves are opened simultaneously by a single rocker arm, the mechanism that bridges the two valves together is called what?

In the rear of the engine

Where are accessory drives located on diesel engines?

Gear, Chain or Belt Drive

Which type of drive can be used to transfer motion from the crankshaft to the camshaft?

Overhead Valves

Which type of engine always uses push rods?