Oil Passing By Rings
 

350 Chev Ss With Venolia .060 Pistons. Have Used The R-9941 Ring Set For Years. Now Oil Is Going By The Rings Big Time. The Set Is .065 Over, File The Top Ring To Fit Cylinder And Install Oil Ring. The Piston Will Fit In The Bore With The Oil Ring On It Without A Ring Compressor. I Have Two Blocks, Measured The Cylinders Which Are Ok. Any Comments-thanks

Re: Oil Passing By Rings
 

Piston Groove height may have opened up? or depth? be sure ring measures what older one did. Maybe slight machining problem?

Re: Oil Passing By Rings
 

Sounds like the wrong oil rings got thrown into the package.

Re: Oil Passing By Rings
 

This Is With A Piston That Has Not Been Run Yet. Seems To Be A Change In The Ring.

Re: Oil Passing By Rings
 

Any One Have Any Ring Kit Part Numbers For The 350ss .060 Piston With .031 Dykes Ring? Thanks

Re: Oil Passing By Rings
 

Dykes rings are not packaged in full sets from Speed Pro if I rememebr right. We always bought them seperately as an open stock top ring. The oil ring issue sounds like you have the wrong expanders or rails. You can buy rings from other suppliers that will package exactly what you want and they offer some different designs, like a Hastings syle oil ring expander. Total Seal or possibly J.E.

Re: Oil Passing By Rings
 

Correct. If you want a Speed Pro Dykes ring set, you have to "build" it from "open stock" rings.

Total Seal will make most anything you want, but Keith Jones (the guy I work with at Total Seal) is not a fan of Dykes rings. Keith will likely advise you to go metric with spacers, and put a custom low tension Speed Pro SS-50U series oil ring together. But he WILL do a Dykes setup if that's what you want.

Re: Oil Passing By Rings
 

Thanks Guys

Re: Oil Passing By Rings
 

Rick,

You should have 15 lbs of drag on the piston with the oil rings installed. If you can install the piston without a ring compressor you have the wrong rings. Install the piston in the bore up side down and attach a fish scale to the large end of the rod and pull the assembly up the bore and read the resistance in pounds. You should have about 15 to 18 lbs. Anything less and you will get oil past the rings. Once you find a good set of expanders keep them and only replace the rails on the oil ring when you are freshening your engine

Mike

Re: Oil Passing By Rings
 

Thanks For The Info Mike