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Cracked block on M

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Bill

01-30-2000 08:43:19




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I bought an M a few years ago and discovered that after I had it for a few weeks, the block had a crack (you could see the faint line and feel it with your finger when you had the head removed). It caused the engine to overheat and the oil to become contaminated with water. Its now sat for the last couple years while I tried halfheartedly to find a new engine.

Is this fixable? any idea on cost? What engines will bolt in? only M's? any idea what is a decent price for an engine? any advice is welcomed. Thanks

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Leon

02-01-2000 08:53:37




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 Re: cracked block on M in reply to Bill, 01-30-2000 08:43:19  
Bill-In answer to what other block will fit, it depends on whether your M is an early or late version. The early M had the temperature sensor up on the head. The late M has it on the right rear of the block. If yours is a late M, the the block from a 40 will fit exactly, and so will, I think, one from a 420/430. I might be mistaken on the last part. If it isn't the 420/430, then it is the 320/330. You would have to check the bore and stroke to find which of those two are 4" bore and 4"stroke.

If you have an early M, you would either have to use your head/temp sensor arrangement as is and plug the hole in the right rear of the block, or put your temp sensor in the right rear of the block and plug the hole in the head. This last way would be the best, because the location was changed to get a more accurate temp reading on the late M. The early M had a problem of showing that they were running hot when they really weren't.

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RonMC

01-30-2000 09:01:49




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 Re: cracked block on M in reply to Bill, 01-30-2000 08:43:19  
Bill, I'm on the west coast of Canada here, Have a local dismantler who has a row of these engines. Don't know prices, but will give you their info. They don't have a web site (old fashioned), but they are honest and reliable and will ship to anywhere. I've given the info to other people from Maine to Arizona and everybody has been happy with the service. The Can. $ is also about 2/3 of U.S., so it makes prices a lot better. It's Norlan Parts, 21341 - 83rd Ave, Langley, B.C., Canada V2Y 2C6, phone (604)888-2251, Fax (604)888-1219, The owner's name is Jake Stobbe. Give it a try, let me know, and I can give you shipping info, etc.

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al

01-30-2000 08:49:38




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 Re: cracked block on M in reply to Bill, 01-30-2000 08:43:19  
Where is the crack? I had a 440 IC gas repair sleeved to correct a crack in the cylinder.

Al



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Bill

01-30-2000 20:59:08




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 Re: Re: cracked block on M in reply to al, 01-30-2000 08:49:38  
Hmmm...its been some time since I looked at it, but with the head off, the crank ran from the cylinder to the outside of the block, I always assumed that the crack couldn't be sleeved because I assumed it went into the water jacket otherwise, how could I get water into the engine oil (it emulifies frsh clean oil in about 5-10 minutes)...you fellas think that sleeving could solve the problem?



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Z-bar

01-30-2000 08:59:47




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 Re: Re: cracked block on M in reply to al, 01-30-2000 08:49:38  
al, I bought a 40 some years ago that had water freeze and crack both cylenders. took it to a machine shop and they put sleeves in, used it for several years, never had any problems with it. sounds like his may be cracked from a water hole to a push rod hole.



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