Head gasket diagnosis

What can cause an engine to overheat similarly to a head gasket failure?

• A faulty spark plug

• A restricted radiator

• A broken fan belt

• A clogged air filter

What color does the test chemical turn if combustion gases are present in the cooling system?

• Yellow

• Green

• Red

• Blue

What tool is recommended for detecting combustion leaks in diesel engines?

• A fuel injector cleaner

• A 5-gas analyser

• A vacuum gauge

• A spark plug tester

What might indicate a head gasket failure between cylinders?

• Noisy exhaust

• High oil pressure

• Low coolant level

• Rough idle and high fuel consumption

What is a common symptom of a head gasket failure between coolant passages and the lubrication system?

• Oil in the coolant

• Low battery voltage

• Excessive brake wear

• High engine RPM