A customer comes into a shop with a complaint that his car is smoking. The smoke appears in a big cloud after starting and then clears up. He also notes smoking during long periods of deceleration or idling. Technician A says that the valve stem seals may be worn. Technician B says that if the valve stems are worn, they may be changed without removing the cylinder head. Who is correct?

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The Answer of A customer comes into a shop with a complaint that his car is smoking. The smoke appears in a big cloud after starting and then clears up. He also notes smoking during long periods of deceleration or idling. Technician A says that the valve stem seals may be worn. Technician B says that if the valve stems are worn, they may be changed without removing the cylinder head. Who is correct?

A Customer Comes into a Shop with a Complaint That