Technician A says that an oil filter used in a bypass system can filter out smaller particles from the oil than a full-flow system. Technician B says that a full-flow filter that is mounted in a horizontal or inverted position requires an antidrainback valve. Who is right?

Question

Quizplus · Accepted Answer

Technician A is correct because a bypass oil filter system indeed filters out smaller particles since it operates by filtering a small portion of the oil at a time, allowing for finer filtration. Technician B is also correct because a full-flow filter mounted in a horizontal or inverted position needs an antidrainback valve to prevent the oil from draining out of the filter when the engine is turned off, ensuring immediate oil pressure upon startup.

Technician a Says That an Oil Filter Used in a Bypass