Piston ring question

DIM · Sep 8, 2019

Working on a rare Italian diesel engine. Has 92 MM rings. I found 92 MM ring but the oil ring is 5.5 MM wide and I can only find 4 MM wide rings. Can I put a 1.5 MM compression ring on top of the 4 mm ring to fill in the 5.5 MM grove. Do you see a problem with doing this

Bob · Sep 8, 2019

Such things have been done before.

Also, check out the link...
Dave Reed

pistonring · Sep 10, 2019

Hi DIM-
You can use a used 92 x 1.5mm compression ring next to the 4 mm oil ring in a 5.5mm wide groove and it will work fine. A compression ring used in an oil ring groove on a piston will not hold any compression due to the oil vent holes in the bottom of the groove so the 1.5 mm ring is only acting as a spacer. Being a diesel I am assuming a cast iron 4 mm oil ring will be used. The 3 piece car type oil rings may be really hard to assemble without something not going together correctly.
Thanks,
Dave Reed
Otto Gas Engine Works
2167 Blue Ball Road
Elkton MD 21921-3330 USA
phone 410-398-7340
http://www.ringspacers.com
http://www.pistonrings.net

Piston ring question

DIM

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Bob

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pistonring

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