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Registered
Join Date: Oct 2014
Posts: 332
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piston rings
1986 Porsche 928 s2
Just took piston ring out and checked end gap and all was ok,but dropped it and not sure which way up top ring and oil ring goes,?DOES IT MATTER ANY IDEAS |
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02-12-2016, 09:29 AM
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Registered
Join Date: Mar 2011
Posts: 470
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Take another Ring off another Piston and check for marking indicating Top or UP
Compression Rings often have a Small circle indicating Up / or Top Oil Ring can go ether way 928 has siliconized Cylinder walls Porsche 928 V8 Nikasil Cylinder Treatment | Kuhn Performance As such the Rings fit tight and last a VERY Long time 200 / 300 K Miles often |
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03-06-2016, 10:29 AM
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Registered
Join Date: Mar 2011
Posts: 470
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Take another Ring off another Piston and check for marking indicating Top or UP
Compression Rings often have a Small circle indicating Up / or Top Oil Ring can go ether way 928 has siliconized Cylinder walls Porsche 928 V8 Nikasil Cylinder Treatment | Kuhn Performance As such the Rings fit tight and last a VERY Long time 200 / 300 K Miles often |
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03-06-2016, 10:30 AM
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Registered User
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Yes, it matters...if you want it to be right. If you put it in the groove upside down, you could get excessive blowby, oil usage or worse case scenario...cylinder scuffing.
Look for some sort of marking that indicates top, circle or lazer mark. Brian. |
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03-07-2016, 01:10 AM
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