It originally sounded like lifters. Last year under warranty, the dealer replaced only 2 on the dirver side. I offer to pay to have them all replaced but thats another story. In addition to the lifters they replaced a belt idler arm. The repair helped, but now its back. When the engine is stone cold it purrs like a kitten, around 105 deg it starts. At 210 its back to purring.
Any ideas?
2001 LS1 A4
They say its not piston slap
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