ASE A1 Engine Repair
The engine must be cold for all engine manufacturers
Statements are correct when adjusting valve lash on engines with overhead camshaft cylinder heads, EXCEPT:
Prevents inaccurate readings
reasons why you must disable the fuel injection system and ignition system when conducting an engine compression test, EXCEPT
Timing belt tension too loose
the following creates a flapping sound near the front of the engine
Low power
A technician is using a laptop computer and manufacturer software to test the ECT (Electronic Controlled Throttle) circuit that has a stored DTC P1121 (Electric Throttle Control Actuator). Which of the following customer concerns could be caused by a defective ECT return spring malfunction?
Both A and B
A power balance test is being performed on an engine. Technician A says to note the engine RPM before and during the test for each cylinder. Technician B says to record the RPM drop for each cylinder. Who is right?
Rod bearing
A technician hears a knock or thumping at the side of the engine block that is louder when the engine is hot and goes away when the affected cylinder is shorted out. Which of the following could be the cause?
Rod bearing
An engine is making a knocking sound that changes with RPM, and the noise disappears while a cylinder is being tested during the cylinder balance test. Which of the following could be the cause?
Piston slap
An engine noise sounds like a knock at the side of the engine that is louder when the engine is cold and goes away or is reduced when the engine reaches operating temperature. Which of the following is the MOST likely cause
Both A and B
Technician A says old antifreeze may cause corrosion build-up in the cooling system. Technician B says some original equipment manufacturers (OEM) recommend that the coolant be changed at specified intervals. Who is right?
A only
Technician A says the closed coil end of a valve spring should go against the cylinder head. Technician B says all valve springs use shims to control free spring height. Who is right?
B only
Technician A says the voltage required maintaining spark is referred to as the spark line and the duration of the spark line is based on total primary circuit resistance and coil voltage available. Technician B says problems with the burning (called fuel propagation) will show up within the spark line. Who is right?
Mixing tap water and distilled water
The following steps is LEAST likely to be necessary when refilling a cooling system
Grinding the valve stems
The surface of the cylinder head has just been machined. What will have to be done to the valve train?
