I got my new piston in and everything put together and I got the engine broken in. Well after the first gallon of gas the piston seems to make a loud sqeeke sound when started and would be constant while running. I have it running a little rich for the brake in period so I cant figure out what it is. It has great power so I dont think its a ring problem or it would be getting less compression. So if you gotta an idea thanks.

 

Ok I think I found the problem. I sat beside it and kicked it a few times and it seems to have air hissing out of the top head gasket. Would this cause a low constant sqeeke type sound????

 

Yes it would, and an airleak like that could fry your piston (again). To make sure thats where it is, spread some water aross the head gasket where you think it may be leaking and check for bubbles. This sucks, oh well, I have a 3 inch sidewall slice on the my 400's left front tire, so I'd have to tak the recon anyway.