Technician A says that the valve guides must be repaired before machining the valve seats. Technician B says that valve seats may be removed and replaced on some cylinder heads. Who is correct?
A) A only
B) B only
C) Both A and B
D) Neither A nor B

Question

Quizplus · Accepted Answer

Technician A is correct because damaged or worn valve guides can lead to improper seating of the intake and exhaust valves. Thus, it's important to repair these guides before machining the valve seats.
Technician B is also correct because some cylinder heads have removable valve seats that can be replaced if they become worn, damaged, or distorted. However, this is not always the case and largely depends on the specific cylinder head design.

Technician a Says That the Valve Guides Must Be Repaired