garbagestate 44 Posted December 10, 2015 Report Posted December 10, 2015 Hi All, I have an ind 32 (265) engine which had lousy compression in the rear cylinder. I took it apart to find out why and it turned out to be 2 stuck compression rings. The upper ring broke when I tried to free it up and standard rings for a 250.6-265 are thicker and won't fit in the grooves. To make it even more interesting,these pistons have 2 compression rings and 1 oil ring unlike a run of the mill 251 which has 2 compression and 2 oil. This engine only has maybe 2 hours of run time on it and it was still in the crate when I got it several years ago.Do you think I could substitute a standard 4 groove piston in that rear spot with out any trouble? Otherwise I have a feeling this is going to turn into an Easter egg hunt trying to find the slimmer rings.It was manufactured toward the end of the run about 1970. Thanks Quote
greg g Posted December 10, 2015 Report Posted December 10, 2015 any markings on the piston at all? Quote
garbagestate 44 Posted December 10, 2015 Author Report Posted December 10, 2015 No, Oddly enough,the only markings are what look like little star of david six point stars located in the 4 recessed areas around the wrist pin hole. Quote
55 Fargo Posted December 10, 2015 Report Posted December 10, 2015 GS 44 shoot a PM to Tim Kingsbury, he may have a lot more insight into this matter, and be able to steer you into the right direction to resolve this problem. Quote
garbagestate 44 Posted December 11, 2015 Author Report Posted December 11, 2015 Thanks for the suggestion, I sent him a pm. Quote
55 Fargo Posted December 11, 2015 Report Posted December 11, 2015 (edited) Hi , did you get any info, or resolve this issue, kinda curious.... I figured Tim Kingsbury should be able to help sort this out, where most on this forum can't. Hope it works out for you.... Edited December 11, 2015 by Fargos-Go-Far Quote
garbagestate 44 Posted December 11, 2015 Author Report Posted December 11, 2015 Yeah, Thanks a bunch for steering me in his direction.I talked to him today and he's a nice guy and extremely knowledgeable on the L 6 in all it's variety's. I never would have figured it out by myself. From his description it sounds like he lives in God's country unlike myself where we are all packed in like sardines. Thanks again. Quote
austinsailor Posted December 11, 2015 Report Posted December 11, 2015 Simple fix. Get a ring that is too thick, find someone with a surface grinder, make it the thickness you want. 1 Quote
knuckleharley Posted December 12, 2015 Report Posted December 12, 2015 Hi All, I have an ind 32 (265) engine which had lousy compression in the rear cylinder. I took it apart to find out why and it turned out to be 2 stuck compression rings. The upper ring broke when I tried to free it up and standard rings for a 250.6-265 are thicker and won't fit in the grooves. To make it even more interesting,these pistons have 2 compression rings and 1 oil ring unlike a run of the mill 251 which has 2 compression and 2 oil. This engine only has maybe 2 hours of run time on it and it was still in the crate when I got it several years ago.Do you think I could substitute a standard 4 groove piston in that rear spot with out any trouble? Otherwise I have a feeling this is going to turn into an Easter egg hunt trying to find the slimmer rings.It was manufactured toward the end of the run about 1970. Thanks What size is your bore? I have a partial set of .040 over rings,and a couple of complete sets of rings for .020 over bores/pistons. The rings are for a 3-7/16th bore and are 3/32 and 5/32 thick. Let me know what you have and I will dig them out to verify. BTW,I bought hundreds of sets of Pedrick Rings for pre-1955 cars,trucks,and tractors from a local NAPA store that closed their machine shop,and am selling them at 1954 prices. Quote
knuckleharley Posted December 12, 2015 Report Posted December 12, 2015 Simple fix. Get a ring that is too thick, find someone with a surface grinder, make it the thickness you want. You can do the same thing with a piece of window glass,some kerosene for lube,and a sheet of emery paper. I've even filed end gaps down on .060 over rights to find .040 bores in my 40 Knucklehead years ago. Just use needle files and use the bore for your gauge. File some,and then put the ring part way down the bore,and measure the gap. No big deal. Quote
Young Ed Posted December 12, 2015 Report Posted December 12, 2015 Yeah, Thanks a bunch for steering me in his direction.I talked to him today and he's a nice guy and extremely knowledgeable on the L 6 in all it's variety's. I never would have figured it out by myself. From his description it sounds like he lives in God's country unlike myself where we are all packed in like sardines. Thanks again. What did you figure out? Quote
garbagestate 44 Posted December 12, 2015 Author Report Posted December 12, 2015 I didn't know that Chrysler made all these ring thicknesses for different industrial applications or what kind of searches I was going to have to do to come up with a ring that would fit. Turns out that there were several on ebay that would work so I pulled the trigger on one of them. Before that I was thinking that if I had to I would just stick a 4 groove piston in that end spot. It probably would have weighed differently but this motor isn't in a Lamborghini. Quote
Tom Skinner Posted December 12, 2015 Report Posted December 12, 2015 Your'e right Lamborghini could never build such an excellent engine. I'm glad to see you located some rings. Quote
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