Do piston rings rotate on the piston?

[CobraEd]

Originally Posted by Excaliber

I would not assume the cross hatch is perfectly equal, it's not likely to be perfect. With more or less cross hatch on either the down or up stroke and some variance between cylinders.

I thought the cross hatch was for initial break in and seating of the rings, and that it is worn off after the engine is broken in.


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[FWB]

Originally Posted by CobraEd

I thought the cross hatch was for initial break in and seating of the rings, and that it is worn off after the engine is broken in.


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promotes oil retention on the cylinder wall. with proper maintenance, i have seen 100k mile motors still retaining some cross hatch, when cross hatch is gone ring rotation stops\decreases

[blykins]

Originally Posted by CobraEd

I thought the cross hatch was for initial break in and seating of the rings, and that it is worn off after the engine is broken in.


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Hone marks will stay on for a long time.....I've pulled apart engines with 100k miles on them with the crosshatch still there.