Re: Do rings rotate?
Rings do rotate. I saw it fairly recently in an 0-200 Continental that an 'engine shop' had supposedly overhauled. The engine was returned to that shop twice for low compression and excessive oil consumption which continued.
We jerked the cylinders off it and found them tapered quite badly and the rings were lined up on 2 cylinders within 10 hours. Straightened them out, new rings and balanced the new pistons as they were out quite a bit. Engine has been running fine for about 3 or 4 years now. Knock on wood.
Maybe the engine was stuck together with those ring gaps all lined up, but, I doubt anyone would do that. But, they never took the taper out of the cylinders so who knows.
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