Technician A says that if the ring end gap is excessive, blowby gases can travel past the rings and into the crankcase. Technician B says that piston rings usually include three compression rings at the top of the piston and an oil control ring below the compression rings. Who is right?

Question

Quizplus · Accepted Answer

Technician A is correct because excessive ring end gap allows combustion gases to bypass the piston rings, leading to blowby and increased crankcase pressure. Technician B is incorrect because typically, a piston will have two compression rings and one oil control ring, not three compression rings.

Technician a Says That If the Ring End Gap Is