Two technicians are discussing combustion slobber. Technician A says that low piston temperatures also mean the piston has not fully expanded and will easily allow lube oil into the combustion chamber. Technician B says that the black gooey liquid that leaks from exhaust manifold joints and the exhaust pipes when engines are excessively idled is called sludge. Who is right?
A)A only"
B)B only"
C)Both A and B
D)Neither A nor B"

Question

Quizplus · Accepted Answer

Low piston temperatures can prevent the piston from fully expanding, which may allow lube oil to enter the combustion chamber. Technician B is incorrect because the black gooey liquid is typically referred to as "combustion slobber," not sludge.

Two Technicians Are Discussing Combustion Slobber