Technician A says that when the oil is cold and thick, it can bypass the oil filter. Technician B says that when the oil filter is dirty and restricted, oil can bypass the filter. Who is right?

Question

Quizplus · Accepted Answer

Both technicians are correct. When the oil is cold and thick, it can bypass the filter because it is too thick to pass through the filter media. Additionally, when the filter is dirty and restricted, the bypass valve opens to allow oil to flow around the filter element rather than through it.

Technician a Says That When the Oil Is Cold and Thick