Technician A says intake valves take the most punishment and should always be replaced whenever in doubt. Technician B says many exhaust valve stems have a welded on hardened tip. Who is right?

Question

Quizplus · Accepted Answer

Exhaust valves typically endure more extreme temperatures and conditions compared to intake valves, leading to the practice of welding a hardened tip on many exhaust valve stems to increase durability and wear resistance. Technician A's statement is incorrect because it is generally the exhaust valves that take more punishment due to higher temperatures and corrosive gases they are exposed to.

Technician a Says Intake Valves Take the Most Punishment and Should