Join Date: Feb 2003
Location: Central Georgia
Re: Lifters? Valve Train? Piston Slap?
Piston slap was common on the early LS engines. It was so bad that there was a web site dedicated to the problem. A few have had the engines swapped out under warranty but, more often than not, nothing was done. Valve train noise is common in all LS engines to a certain degree. I had an 02 that had it bad. Problem turned out to be sloppy lifter bore tolerances which let the lifter bleed down thus increasing valve clearance.
Unfortunately, there is no easy cure except for running a loud exhaust or sound system.