farmall M block questions

bigA · Apr 21, 2013

Hey fellas, I have a question for y"all. Tearing down a friends M
with a non stock block. Has a bolted on cover plate behind
thecarb on the block. As we were pulling the sleeves, I noticed
letters stamped on the deck on the left side of the cylinders.
1,2, and 3 all had the letter C stamped next to them. Those
sleeves pulled easy enough. Cylinder 4 had an A stamped
next to it, and that sleeve took a puller, a bfh, and a floor jack to
remove. Are these letters on the deck related to cylinder
sleeve fit?

CNKS · Apr 21, 2013

Yes--However, most if not all kits you can buy don't take the letters into condisideration. I don't know if CaseIH sells ones that do.

Janicholson · Apr 21, 2013

Exactly. A is the smallest bore, tightest fit later letters are bigger. At the engine assembly station, IH used select fit and had different sleeves to use in each to assure correct fit. Almost all but custom sleeves (from a company like LA Sleeve)have a small range of real sizes near the mid point of the series. An hole labeled with an A will be very snug. Freeze the sleeves and heat the block to just able to touch it to assure getting it in W/O cracking the new Sleeve.
Jim

bigA · Apr 22, 2013

How do we go about heating the block? Torch?

Janicholson · Apr 22, 2013

A heat lamp in the bore for 2n hrs will do. Jim

teddy52food · Apr 22, 2013

Use a ridged hone in that tight bore very carefully & take out a half a thousand.

farmall M block questions

bigA

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CNKS

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Janicholson

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bigA

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Janicholson

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teddy52food

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