Piston ring order - Team Camaro Tech
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post #1 of 3 (permalink) Old Jul 16th, 03, 05:59 PM Thread Starter
Join Date: Jan 2003
Posts: 21

I'm putting together a 305 and I'm ready to install the piston rings, however I'm not sure what ring goes on top. They are perfect circle rings, One has a large bevel on top and the other one has a small bevel on the bottom. Which ring goes on top?

Thank you,
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post #2 of 3 (permalink) Old Jul 16th, 03, 10:25 PM
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Join Date: Feb 2002
Location: N.W. Washington
Posts: 7,963

you should have some instruction sheet of some sort that came with the rings. if you don't you really should email perfect circle, or check the web site for identification. but, if i were to guess, here's what i'd do. if there is any mark, like a dot or something put that facing up on the piston. then the ring with the large bevel, is likely the top compression ring, and the bevel should face up. the top ring should also be a tighter, harder to expand ring, since it's likely a ductile iron. the bottom ring is likely the ring with the slight bevel, and the bevel should face down, as long as a mark, such as a dot doesn't tell you otherwise, dots up. the second ring should be cast iron, and more "flexable" as well. but i would REALLY make absolutely sure by contacting the manufacturer first. also be sure the rings are properly "clocked" on the piston. good luck with it


1968 rs with an old school 354" SB2.2 pump gas motor.

Repetition does not transform a lie into a truth.

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post #3 of 3 (permalink) Old Jul 17th, 03, 02:44 AM
Join Date: Aug 1998
Location: Waldorf Md. USA
Posts: 3,288

Ditto on what 68 said...you dont want to get them wrong. Take them down to your machine shop...they should be able to tell by looking at them, or call PC and get it right.

Bill Koustenis
Advanced Automotive Machine
Waldorf Md
1971 Chevelle "Heavy Chevy" original owner

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