[katy]

Originally Posted by dean from bozeman

So I had an engine rebuilt some years ago. The rebuilder said that he liked to bore engines tight so that when they broke in they would last a long time. The engine runs but then you can't restart it while it's hot because of expansion. If you wait for a while it will eventually cool down and then you can restart it.

At first I thought that it was that the pistons were too tight. I replaced the .040 pistons with .030 pistons. It runs but still "freezes up" after running for a while.

I would take it back to the rebuilder but he is no longer in business. I wonder why?!

Short of having the engine rebored (cylinders and main) are there any suggestions on how to get this engine useable?

Thanks.
Dean

Have you checked ring end gap?