Technician A says that after refinishing a 45⁰ valve seat, a 30⁰ angle should be used to position the valve seat on the valve face. Technician B says that before a valve guide is repaired, the valve seat should always be ground. Who is right?

Question

Quizplus · Accepted Answer

Technician A is correct that a 30⁰ angle should be used to position the valve seat on the valve face after refinishing. Technician B's statement about valve seat grinding before repairing a valve guide is not always necessary and therefore incorrect.

Technician a Says That After Refinishing a 450 Valve Seat

Technician a Says That After Refinishing a 45⁰ Valve Seat