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cracked block - advice please

D

Dan W MN

Member
I just pulled the sleeves out of my 48 Farmall M. One had beed damaged by the wrist pin slapping arround in the sleeve after the piston broke. When I got the sleeve out (which took considerable effort) I noticed that not only it but the block as well have two cracks. My question is: If I just slide the new sleeve in, will the snug fit between it and the cylinder wall be enough to keep coolant from leaking through the cracks into the crank case? Please look at the pictures and let me know what you would do. Thanks for your advice.
a17195.jpg

a17196.jpg
 
Take it to a good machine shop and have that hole bored out and a repair sleeve pressed in then bore that out to take the stock sleeve . Done that many times and it is a lot cheaper then a new block
 
The Tractor Vet is exactly correct. The repair sleeve will be thick material, and will provide the block with substance and straightness, as well as a seal from water leaks. The thin dry standard sleeve should be purchased before the final boring to assure the correct dry sleeve fit in the new bore. Jim
 
The tractor vet is correct on the repair. I would check around though about a good used block. In the last several months I have seem several running "M" sell under a thousand dollars. The used parts are getting cheaper here as a result. The machine work to put in a repair sleeve is not cheap.
 
I had the same thing on an 806 diesel. I had the block bored out and a repair sleeve put in and then the hole bored to accept the new piston sleeve . That was 20 years ago. Still running with no problems. I will be probably doing an overhaul on it in the next 20 years and will probably put the new sleeve right back in the repair sleeve.
 
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