Well, I am at a loss here. I have a 2001 Z06, and started hearing a very disturbing sound from the top end of my motor at just 39K. After reading the forums, I suspected a faulty valve spring was my culprit. I found my number 2 cylinder was running about 30lbs light on compresssion and lost 24% on a leak down test. At this point I was still thinking valve spring. Did a wet leak down test with oil in the cylinder, had vey similar results - about 19% on leak down. Here is where it gets tricky, my mechanic tour down the valve train and called me to say everything on the top end was in good shape and he suspects I blew a ring and the engine should be replaced. The electrode on the number 2 plug as acutally bent to the side. The engine actually runs fine, minus the loud ticking. Obviosly I have not tried to push the car since this started. Any advice? BTW, quote I got for crate motor and install was $9k - Ouch. If a new motor is needed, wouldn't a rebuild be much cheaper and bore this baby out for a few more ponies? I really don't want to go over $3k to fix this, dont' want to and can't afford to. Any advice would be appreciated.