Technician A says that a burned exhaust valve can result from a valve seat that is too narrow. Technician B says that an exhaust valve seat should be wider than an intake valve seat. Who is right?

Question

Quizplus · Accepted Answer

Technician A is correct because a too narrow valve seat can lead to poor heat dissipation from the valve to the head, causing the valve to overheat and burn. Technician B is correct because an exhaust valve seat should indeed be wider than an intake valve seat to better dissipate the higher heat associated with exhaust gases.

Technician a Says That a Burned Exhaust Valve Can Result