Technician A says that the exhaust valve is larger than the intake valve to ensure that all the exhaust gases leave the cylinder. Technician B says that the exhaust valve is larger than the intake valve to ensure proper heat dissipation. Who is right?

Question

Quizplus · Accepted Answer

Typically, the intake valve is larger than the exhaust valve. The intake valve is larger to allow more air-fuel mixture to enter the cylinder, which is crucial for making power. The exhaust valve is smaller and doesn't need to be as large because gases are under pressure and can exit the cylinder more easily. Neither technician's statement is correct regarding the relative sizes of the valves and their purposes.

Technician a Says That the Exhaust Valve Is Larger Than