farmall M

ohiojim · Apr 10, 2013

the 49 farmall i'm re-doing smokes quit a bit, i think most is from valve guides as it is worse when holding back, but the question i have is have any of you just honed the old sleeves and put new rings in, rather then re-sleeve,..not like it'll be working for a liveing ???

pete 23 · Apr 10, 2013

Many a M has had new rings put in. I would say this, if it has any ridge on the bottom of the ring travel I would forget about just rings. If cylinders are in good shape, make sure the top ring groove is not worn more than .006. If it is the ring will not seal properly and probably break shortly. I always of course measure piston skirt for piston to cyl clearance.

onefarmer · Apr 10, 2013

I just did something like that to an M. I had one tractor burn up in a fire. Pulled that engine apart and found the pistons still in good shape. Dug my grandfathers M out and replaced his Flattop pistons with my domed ones, add new rings, a good honing of the cylinders, and now it's up and running.

Make sure your sleeves are in good shape, remove any ridge at the top of the sleeve, hone it good. While the head is off, check valve clearances, maybe add some umbrella valve seals.

rustred · Apr 10, 2013

yep, no problem. them old tractors are not fussy. basically if you can hook your finger nail on top ridge it requires sleeves. but as a chore unit your ok. do the necessary's as pete says and valve job , set of rod brgs and you have a beginner's o/h.

John B. · Apr 10, 2013

When you get your pistons out and the rings off, put one of the old rings in the sleeve and level it off in the sleeve by pushing it down with the piston. Measure the ring gap. Do this with the ring at various spots in the sleeve. This can show how much wear your sleeve has also.

rustred · Apr 10, 2013

yes, but anything over .016 would be called ring and sleeve wear. for more accurate sleeve wear need to use a new ring then anything over .016 is sleeve wear.
I am using .016 cause the spec is .003-.004 for each inch of cyl. bore.

David R Inman · Apr 10, 2013

Also works with engines that locked up, and that you can only get free by pressing the piston out, so long as the sleeve isn't too pitted, worn, or damaged.

farmall M

ohiojim

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pete 23

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onefarmer

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rustred

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John B.

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rustred

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David R Inman

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