I think you have someone that is guessing at what the problem may be. I have to agree with you. The clutch (unless you were really hard on it) shouldn't have been bad. As far as the catalytic converter, the same thought. Now for the engine, I need you to tell me a few things. Was the check engine light ever on or flashing when you felt the misfire? Based on what you described as far as driving it all the time, leads me to believe there is another problem and not the ENGINE. Just for the heck of it, tomorrow, first thing, call the shop and tell the mgr to give you the compression readings for each cylinder. Tell him you want to know if they did both a dry and wet compression test and the results. Let me know what you find out. If they are being honest, that should be info that he has at hand. Also, for them to determine if the rings are the issue, they would have needed to do a wet test. Basically, a wet test involves placing a small amount of oil in a cylinder before testing. The oil coats the cylinder and rings preventing a loss of compression. Thus, the compression would increase indicating there was a loss of compression due to ring failure.
Better yet, don't ask him about the wet compression test and see if he tells you. If he doesn't, then ask how they know it is the rings and not a stuck or burnt valve or a timing issue (which I don't think is the issue either).
I have owned Vipers myself. NEVER did I have an issue with rings. And yes, my car sat a lot because I am in PA and we get a lot of snow. My 92 only had 28K on it when I sold it last year and I had no problems with any of the things you had done or what is being suggested.
Thursday, September 18th, 2014 AT 6:11 PM