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Registered
Join Date: Jun 2004
Location: La Habra Hts, CA
Posts: 837
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Need Confirmation on Ring End Gaps
I am in the process of installing new JE 85mm (84.92 actual) pistons with JE Proseal rings into my cylinders that were bored to 85mm. In checking the ring end gap I am finding that the first ring is tight at .12-.15mm and the second ring is tighter at .10mm. All measurements taken at room temp.
My Porsche Technical Spec booklet indicates .15-.45mm and the JE paperwork (vaguely) states .15 up to .17mm. I am thinking they are made this way to facilitate filing for a precise fit in each cylinder so I am prepared to do this. But, before I start this process, I'd like a little backup from the experts regarding the need to file the rings and what the target end gap should be for each ring. Thanks! |
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12-29-2007, 03:59 PM
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Evolved
Join Date: Jan 2007
Posts: 3,338
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Go with the piston ring (J.E.'s) mfg.'s suggestion.
Most aftermarket/custom rings ARE tight/oversize and are meant to be filed to have a custom fit. You will be comfortable afterwords, knowing they are all in proper spec.
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Don't fear the reaper. |
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12-30-2007, 04:58 AM
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