Technician A says hydraulic pressure from engine oil is a component of variable valve timing. Technician B says that some variable valve timing systems use a timing chain and gears as the main drive system. Who is correct?

Question

Quizplus · Accepted Answer

Both technicians are correct. Hydraulic pressure from engine oil is used to actuate the system that controls the variable valve timing. Some variable valve timing systems use a timing chain and gears, while others may use a belt or other means of driving the system.

Technician a Says Hydraulic Pressure from Engine Oil Is a Component