Quote:
Originally Posted by A26B
I've seen the groove between the compression rings on Mahle LT5 pistons before. Can you elaborate on yours?
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Jerry,
most all of the high end pistons have this. I believe the theory is to provide more volume for the gas pressure that escapes past the top ring. The groove helps relieve that instead of compromising the ring seal in the land. At least that's the way I understand it.