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George Mirza · 02-06-2015, 11:51 PM

It's possible there is a small radius at the bottom corner of the ring groove. If the rings have a sharp square edge, when the seat in the bottom of the groove this could cause this rotation problem. This could be as small as .001-.002 radius and not visible to the eye. Is there a chamfer on the inside edge of the rings and spacers?
Interesting, keep us posted.
George

02-06-2015, 11:51 PM	#8
George Mirza Senior Member Join Date: Jan 2002 Location: North Attleborough Ma. Posts: 522 Likes: 0 Liked 0 Times in 0 Posts	Re: Piston/Ring issue??? It's possible there is a small radius at the bottom corner of the ring groove. If the rings have a sharp square edge, when the seat in the bottom of the groove this could cause this rotation problem. This could be as small as .001-.002 radius and not visible to the eye. Is there a chamfer on the inside edge of the rings and spacers? Interesting, keep us posted. George