Joined
·
174 Posts
I am not having a problem here, just trying to understand why some of the engine manufacturers used to pin the piston rings. Did they feel the rings turned and were trying to keep the gap out of the exhaust port. Does anyone know whether piston rings, 2 or 4 cyc, actually rotate around the piston?
I am just curios and am looking for answers.
I was taught in school 47 yrs ago to never put ring gaps on the major or minor thrust side of a piston, but to start a little way, say 25deg from the wrist pin and place the gaps 120deg apart.
Maybe through the years, it has been determined that they do rotate, but if not all three uniformly, does it affect cylinder bore wear when all of the gaps line up? blowby? Tom
I am just curios and am looking for answers.
I was taught in school 47 yrs ago to never put ring gaps on the major or minor thrust side of a piston, but to start a little way, say 25deg from the wrist pin and place the gaps 120deg apart.
Maybe through the years, it has been determined that they do rotate, but if not all three uniformly, does it affect cylinder bore wear when all of the gaps line up? blowby? Tom