Doug,
Glad to hear the compression readings looked fine. I know you don't want to do any wrenching because of the warranty, but you could easily remove the spark plug wires (one at a time) and while the engine is running check to see if the noise goes away. This process could help identify which cylinder is causing any noise you hear if the issue is piston/rod related.
CSX WNAB,
Thanks for the great advice. I'm going to give that a try.
Greg,
I was using the Cobra seat "coat hanger tool" as well. What a pain!
