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1500 First and Second Piston Compression Rings The Same?

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Phillip Phillip Robenson
Whittier, California, USA   USA
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I may have mixed up the first and second compression rings on one of my pistons. I had placed them both on my workbench and then quickly forgot which one went where. The thing is, they both measure out to exactly the same dimensions. Are they the same?

As always, thanks for any comments.

Best regards,
Phillip



Edited 1 time(s). Last edit at 2015-03-31 08:46 PM by Phillip.

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PeterC Platinum Member Peter Caldwell
Madison Wisconsin, USA   USA
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I thought the upper had a chamfer on the inner diameter. Probably depends on ring brand tho

Peter c


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Phillip Phillip Robenson
Whittier, California, USA   USA
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They both look exactly the same, which, unless constructed of some different alloy, although I can't imagine that being the case, leads me to surmise that there is no real discernible difference.

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jmac Gold AdvertiserAdvertiser Jere McSparran
Greenup, IL, USA   USA
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1970 MG Midget "(SOLD)"
1978 MG Midget "Therapy"
1978 MG Midget "(SOLD)"
I ran into the same problem a year or two ago. They come separated as 1, 2, and 3 but 1 and 2 look to be exactly the same. I don't know if I got them in correctly or not but I have had not problems with it. So either I guessed right or it doesn't matter. I decided that the most important thing is to get the "top" marking up.

Be sure to "gap" your rings. It is a step many rebuilders forget or fail to do. You should put them in your cylinder before you place them on the piston and check the gap. The gap should be .011. If the gap is too close, file the ends carefully to make it right. The gap is important for heat expansion.



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