need two standard pistons for a 1946 346 engine there 3 ring new or good used thanks for any help i tryed kenter and egges they only sell in sets of eight thanks steve hill 325502 email is orphanauto@yahoo.com
Steve,
I may have a couple in good condition from a spare engine, however, I'm not certain of the year (best guess is 1939). Also, don't know if they are the three ring version, or 4 and they are in storage in Chico. I'll be going up there in about a week so can check, but in the mean time, there are a couple of other specs that might help: What is the piston pin to crown height? If you have it apart (I assume), what is the weight of an exemplar piston. A substitute that is too heavy should not be a problem if you know a good automotive machinist.
I don't know, but it would seem that running a 4 ring piston along side a three ring should make little difference in this low compression, low revving engine, provided the compression ratio and the weight are w/in spec.
Mark Lowery, CLC#25216
[quote author=markl linkI don't know, but it would seem that running a 4 ring piston along side a three ring should make little difference in this low compression, low revving engine, provided the compression ratio and the weight are w/in spec.
Mark Lowery, CLC#25216
[/quote]
Problem with that Mark is that Stephen would have to get a full set of 4 ring piston rings just to use only some of them, and I know from experience that the 4 ring early sets are very expensive, also that bottom ring would be running in a section of the bore that has never had any wear, dont like the sound of any of that much.
I may may have a couple Stephen but shipping from England would be prohibitive. Someone in the US can help surly?
Steve [Passmore],
Always good to get a little dose of reality! Hadn't thought about the issue of where the 4th ring would be running in a used bore. And you're right, this should be a fairly common item as a fair number of engines have been junked for reasons such as cracked blocks etc., so salvaged pistons should be out there and cheap.
While we are on this topic, do you know when Cadillac switched to 3-ring pistons?
Mark Lowery, CLC#25216
Not really sure Mark, 37 and 38 are 4 rings for sure, I junked a 39 engine some years back but dont remember what came out of it. War time engines are all 3 rings so I'd hazard a guess at 41 ish?
Cadillac went to 3-ring pistons in 1946.
Jeff
Quote from: Jeff Hansen on January 28, 2012, 03:41:42 PM
Cadillac went to 3-ring pistons in 1946.
Jeff
That may be the case on domestic cars Jeff but I have to tell you I have two new old stock war time engines and they are 3 rings.
Pretty darn sure 3 ring came out in 1942.
Somewhere in my sheds I have an old 41 block, I must check that out tomorrow to see what rings it has.
does anyone know where i can buy rod cab and 2 rod bolts and carb. kit stromburg for 1941 cadillac 60 special 346 engine thanks very much john sav ga
I presume thats a typo John and you mean 'Rod Cap and bolts'?? I have some if by some weird chance no one in your country helps you out and the carb kits I see everywhere, usually some on eBay or 'Bobs Automobile'
thanks that was a typo im in savannah ga where are you located and how much arethe bolts and caps thanks