Q. I am writing to you about the problem you answered for another reader (Transportation, Dec. 23) regarding a noise from the engine when started cold. You said that it may be piston slap and that it ...

I have a 2003 Pontiac Vibe with 135,000 miles on it. This past winter it would knock for a minute or so on a cold start. A GM tech told me that it has a cold piston slap and it will go for a long time ...

QUESTION: I have a 1999 Buick Park Avenue with 47,000 miles. It started to make a tapping noise. It goes away in a few minutes. I went to the Buick service department, and they claim all GM engines do ...

Question: I have a 2001 Chevrolet Lumina with 48,000 miles on it, and a 3.1-liter V-6 engine. When the engine is cold, I can hear a knock, which sounds like a rod. When the engine warms up, the knock ...

Q: I have a 2003 Pontiac Vibe with 135,000 miles on it. This past winter it would knock for a minute or so on a cold start. A GM tech told me that it has a cold piston slap and it will go for a long ...