Technician A says to grind less than 0.020" from the tip of a valve stem to avoid grinding through the hardened area. Technician B says that the tip should be ground approximately the same amount as the face and seat in order to minimize valve guide wear by centering the rocker arm on the stem tip when the valve is half open. Who is right?
A. ?Technician A only
B. ?Technician B only
C. ?Both A and B
D. ?Neither A nor B
Answer: C
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