Chapter 13

Engine mechanical testing should be performed in all of the following situations, EXCEPT:

• when the engine is running rough and the customer says it needs a tune up

• before performing major engine repair.

• when engine noises indicate a potential mechanical fault.

• during a 30,000 mile service.

A visual inspection of the engine assembly for leaks will affirm the ability of the _____ to contain each of the engine's fluids.

• seals

• gaskets

• both a and b

• neither a nor b

All of the following are used to fully assess the mechanical condition of an engine, EXCEPT

• a compression tester

• a strobe light type balancer

• a scan tool

• a vacuum guage

All of the following statements are true with respect to engine mechanical testing EXCEPT:

• It helps to determine what major engine work is needed.

• It is an integral part of preventive maintenance.

• The tests start off borad and narrow down as each test is performed.

• Testing needs to be done before tune-up parts are replaced.

A pumps air into the engine's cylinder and measures the percentage of air that is leaking from that cylinder.

• Compression tester

• Pressure transducer

• Cylinder leakage tester

• Data link connector (DLC)

The measures the amount of compression pressure an engine's cylinder can generate.

• Compression tester

• Pressure transducer

• Cylinder leakage tester

• Data Link Connector (DLC)

The __ measures the amount of vacuum and engine can generate during various operating conditions.

• cylinder linkage tester

• stethoscope

• pressure transducer

• vacuum gauge

A ___ is used when a technician suspects a cylinder may have low compression.

• compression tester

• pressure transducer

• cylinder leakage tester

• data link connector (DLC)

A ___ diagnosis can identify whether the compression is similar across all of the cylinders

• steering system

• tire pressure

• cranking sound

• engine leak

When performing a cranking sound diagnosis, Technician A says that all engines may be prevented from starting by holding the throttle wide open by cranking. Technician B says that an engine may be disabled by removing the fuel pump fuse or relay (if equipped). Who is correct?

• Technician A

• Technician B

• Both A and B

• Neither A nor B