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331 Worth Saving?

Posted: Sun Jan 28, 2018 9:27 pm
by donny-b
Hello all,
Over the summer I purchased a 1955 331 hemi powered Chrysler generator. I was told at the time the machine was used as a backup for a small building and supposedly had low hours. Unfortunately the owner let it set outside and allowed it to seize. After getting the unit home I filled the cylinders with PB and let soak for a few days. I then used a breaker bar to work it loose. It didn't take much to free it but 2 cylinders had no compression so I decided to disassemble. Everything looked good inside except for a few rings were stuck. Upon closer inspection of the block I found someone had patched the outside between number 3 and 5 cylinders by brazing in a plate! Well, this was a bit depressing to say the least. When I disassembled the engine it had clean oil and was full of antifreeze. There was no indication of water in the oil or an exterior leak of any kind. I spray checked the cylinders for cracks but found none. My question is: Should I be concerned with the patch and scrap the block or continue to re-build the engine?
Thank you in advance.

Re: 331 Worth Saving?

Posted: Tue Jan 30, 2018 7:38 pm
by George
Do you mean a big chunk was busted out of the block, or they brazed a crack & put the patch over it for additional strength? If cracked you could melt out the brass & find a good welder to weld it up. You'll have to decide if worth the cost. How did the cyls mic out?

Re: 331 Worth Saving?

Posted: Wed Jan 31, 2018 1:49 pm
by donny-b
It appears that a chunk of the outside water jacket at the core plug was patched. I have not had the time to examine with a scope through the top of the cylinders but will in the next week or two. As for the cylinders, they mic within .002" of standard size. I have considered melting out the brass and having it patched and welded with nickel but would it be worth it? Since rebuild parts for the old hemi's are soooooo expensive, I may just part out the engine and sell the block for scrap. :cry:

Re: 331 Worth Saving?

Posted: Wed Jan 31, 2018 5:30 pm
by George
find another one first! also does it have standard car heads?

Re: 331 Worth Saving?

Posted: Thu Feb 15, 2018 1:25 pm
by donny-b
The 331 heads are in nice condition with new valves, springs and has hardened seats. The heads were rebuilt probably when the block was repaired.

Re: 331 Worth Saving?

Posted: Fri Feb 16, 2018 7:39 pm
by George
Too bad it isn't together to pressure test it.