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Farmall & IHC Tractors Discussion Board |
Re: 4.125 pistons in M block
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Posted by Farmalldan on June 12, 2002 at 12:13:56 from (64.154.26.248):
In Reply to: 4.125 pistons in M block posted by Flyin Farmall on June 11, 2002 at 19:17:27:
The correct procedure is to bore the block for the Super M sleeves. IHC published a procedure for this in the '50's. Aftermarket suppliers also supplied overbore kits for the M which required boring the block to go to 4-1/8 bore. If you run the pistons in the bores without sleeves, make sure that the rings do not protrude above the sleeve counterbore at the top of the cylinder. If you hang the top ring in the counterbore, you will be the proud owner of a boat anchor. Also, make sure the head gasket will seal without the sleeve. BTW, my dad had his M overhauled in about 1960. 4-1/8" high altitude Firecraters. Dealer dyno'd the old girl at 59 PTO hp after the rebuild. She was one pulling machine.
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