The Stovebolt Site Forums The Shop Area Engine Shop piston rings 0.10 over

I am looking for piston rings that are 0.10 over for a Chevy 216. Do they make them? Where would I find them?

Were you able to get .010 over pistons? Usually the .010 is the wear limit where a rebore to .020 or more is required. I don't know if you would need anything different than standard rings but what was done about the pistons ?

I found some rings, they cost about five bucks more than standard rings. The shop that did the cut told me that they usually bore it to 0.20 over but this block took 0.10 just fine.

Call Egge machine....please measure the pistons you get carefully. Boring a block without the pistons is a little scary

Just thought I would throw this in. I have used oversize rings with standard pistons. One of the tricks that race engine builders use is a loose fitting piston. Won't bind as easily from heat expansion. Take for instance a stock engine that is worn evenly and the cylinders are smooth. The rings that you take out may have as much as .125 ring gap. If your hone the cylinders and use a standard size ring, your ring gap on new rings may be .030, which is way too much since most manuals will state .010 (on about a 4 inch bore) so if you get .010 oversize rings and (the trick is) to custom file each ring for the cylinder it will be used in and fit the ring to the bottom of the bore where there is the least amount of wear. I have done this a number of times with good results. The 305 small block in my '64 has been built with this method.

The question is, can you get them for a 216? I don't know. Probably. No problem getting them for a 305 or a 350. Talking to the right parts man at the right buisness will get you parts that others say you can't.

Truck Tinker

Hi guys and gals,
A good friend of mine has been doing nothing but piston rings for antique cars trucks and tractors for nearly 30 yrs.
Paul Weavers Garage. 680 Sylvan Way. Bremerton WA 98310. 360/373-7870
He goes stricly by bore and over-size and ring width. So he can build anyone a custom set. But he needs to know all the data about your specific engine. When I rebuilt my 1966 Datsun inline 4, I could not find anyone with pistons and rings etc... but he built me a set and I was fortunate to just re-hone my block and reuse the pistons. I now have over 10,000 miles on that rebuild, and they are doing just fine.
Hope this helps, Garry K

I'm confused- - - -do you plan to run the standard pistons in a bore that's .010" oversize, or did you find .010" oversize pistons somewhere? You'll get a horrendous piston slap if you try to run that much skirt clearance on a standard piston.

So far as using file-fit rings to take up taper wear, good luck! A ring that has to expand and contract to stay in contact with a cylinder with more than a .005" taper won't last long. The ones I've seen after a ring job like that were using oil in less than 10,000 miles. I've honed cylinders to straighten .002" or less taper wear, but the absolute max I'll ever attempt is re-ringing a cylinder with .005" taper, and even then , I try to hone the cylinders for minimum taper, no more than .003" after honing. I also knurl the piston skirts to take up any excess skirt clearance. A cold engine with more than .003" of skirt clearance will cluck like a mama hen calling her chicks!
Jerry

The pistons are 0.10 over. I picked up some 0.10 rings for them as well. The problem I ran into now is that the det of pistons I got from ebay had one piston that was 0.20 over. I am calling egge in the morning . I hope they have a match for me.

If you brake that down into michrometer language,
you have pistons that are one hundred thousands or one tenth of an inch larger than stock. I haven't seen pistons larger than eighty thousands
of an inch over size and that was years ago. You would have some very thin cylinder walls bored a hundred thousands. I may be wrong, but something just don't sound right. One marked 0.20 would be two hundred thousands of an inch or nearly a quarter of an inch. By then you would probably bore into the water jacket. I'm not always right, but then, I'm not always wrong.

Truck Tinker

Maybe my . is in the wrong place. My watewr jacket is just fine.