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Farmall & IHC Tractors Discussion Forum
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Farmall M engine rebuild

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DBond12

10-22-2018 20:56:45




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New fellow here...:)

I've been watching this forum for a long time and have picked up a lot of info from everybody on here...now I'm here with a question of my own.

I've just bought a Farmall M which needs an engine rebuild. I'm looking online and seeing that stock bore diameter is 3 7/8" but all of the rebuild kits that I'm seeing out there are for a 4" overbore. My question is - do I have to bore the block out to put in the new pistons or do they use a thin wall sleeve and fit inside the same bore?

Also any recommendations on a good quality kit? The tractor's engine seized due to water getting in the exhaust many years ago. The previous owner tore the engine down and then it got put in the back corner of the shop and forgotten.
Fast forward to today, and I've got myself a winter project.

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charlieu

10-24-2018 15:19:19




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 Re: Farmall M engine rebuild in reply to DBond12, 10-22-2018 20:56:45  
Looking at the part numbers that this site uses for the overhaul kits for a Farmall M I noticed that they are exactly the same as the numbers that Tisco uses. Just saying they seem to be the same parts. If I'm wrong please correct me. I just saying what I see. So are the parts junk or not?



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Ellis Kinney

10-24-2018 11:39:58




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 Re: Farmall M engine rebuild in reply to DBond12, 10-22-2018 20:56:45  
I would strongly suggest having the engine tanked. I did this and got back an engine that looked shiny silver with all port holes cleaned. No rust or obstructions to worry about. It takes a lot nicer looking paint job also. I know this is not your original question. Ellis



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DBond12

10-23-2018 20:21:26




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 Re: Farmall M engine rebuild in reply to DBond12, 10-22-2018 20:56:45  
Thanks very much for all the help folks!

This is going to be just a slow steady work in progress over the next few months. I wanted a winter project and now I've got it:).

Believe it or not, up here in Saskatchewan M's seem to be somewhat few and far between and people are asking upwards of $2000 - $2500 (CAD, of course) for them.
And it's always easier to sneak several purchases past the CFO than one big one :D .

I'm sure I'll be back with questions as I go. First step is loading it and bringing it home this weekend, and then the fun begins.

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IA Roy

10-23-2018 20:03:07




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 Re: Farmall M engine rebuild in reply to DBond12, 10-22-2018 20:56:45  
For the cost to rebuild the engine, You could buy a really nice M!



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FastFarmall

10-23-2018 17:00:14




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 Re: Farmall M engine rebuild in reply to DBond12, 10-22-2018 20:56:45  
For a break in period,i would work it for at least a 1/2 day !



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glennster

10-23-2018 11:30:14




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 Re: Farmall M engine rebuild in reply to DBond12, 10-22-2018 20:56:45  
i bought several kits from this site and had no problems. i would, however, recommend if there is machining done to the crankshaft, let the machine shop get the bearings.



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DBond12

10-23-2018 05:06:38




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 Re: Farmall M engine rebuild in reply to DBond12, 10-22-2018 20:56:45  
Perfect. Thanks very much for the help.

Jim, I don't have a plow (yet!) but I hear you on working it. How long should I expect to have to work it to get the rings to seat?



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jim warehime

10-23-2018 04:32:08




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 Re: Farmall M engine rebuild in reply to DBond12, 10-22-2018 20:56:45  
Look for a good NOS ih kit or a good US made kit, stay away from the Tisco and Chinese or Taiwan kits alot of sites sell. Make sure you check the line bore on the main saddles and bearings. Dont be cheap like most people and not clean the oil galleys and rebuild the oil pump. Wouldn't hurt to take block and major components into machine shop and have hot tanked. You should be able to do a good complete overhaul for under 3k on a gas engine, thats parts and machine shop cost. Good luck.

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rfridy73

10-26-2018 08:41:46




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 Re: Farmall M engine rebuild in reply to jim warehime, 10-23-2018 04:32:08  
Itís very expensive to rebuild and M.I know back in the 80ís a friend wanted me to rebuild his Super M. I bought a factory remand engine cheaper than I Could do it myself, plus a good warranty with it.



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FastFarmall

10-22-2018 22:30:36




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 Re: Farmall M engine rebuild in reply to DBond12, 10-22-2018 20:56:45  
No boring necessary, the sleeves are just thinner, in fact i don't thin they even make the 3 7/8 anymore. this site has good piston kits, but when u do get it running, have something lined up to work it, don't rake hay with it, is what i am saying, have you got a 3-14 plow?



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