All of the following leaks could affect combustion in a cylinder EXCEPT ____.
A) head gasket
B) piston rings
C) valve seat
D) valve guide seal

Question

Quizplus · Accepted Answer

Valve guide seals primarily prevent oil from leaking into the combustion chamber. They do not directly affect the air-fuel mixture's compression or combustion process in the cylinder like head gaskets, piston rings, and valve seats do.

All of the Following Leaks Could Affect Combustion in a Cylinder