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farmall engine repairs

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charley123

05-20-2008 09:24:06

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Can a person swap out the pistons/rods on a farmall M from underneath? Drain oil out, remove oil pan, remove the bearings from below, rotate the crankshaft, lower the rod/piston out the bottom and replace with new one? trying to skin a cat.

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05-21-2008 16:24:07

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Re: farmall engine repairs in reply to charley123, 05-20-2008 09:24:06

Taking the head off can't be that bad. To do an overhaul, you probably need the valves ground and checked out anyway. May need some new ones there along with cleaning up the head. I'd never do an overhaul with going through the head also. Valves, springs, stems, pushrods, rocker arms, etc. all need to be checked. The head and valves may be half the problem, then you end up with half a fix. I'd suggest go through it all or else just keep adding oil.

I have a split ring compressor for a vw that would work from the bottom but may not fit your size piston. Could possibly ream from underneath but who wants to lay on their back doing it with the stuff falling in your face. My 2 cents.

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old

05-20-2008 10:24:22

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Re: farmall engine repairs in reply to charley123, 05-20-2008 09:24:06

Simple answer is no. Ya you might get them out but not back in. Plus the ridge as the other said would need to be removed it it can/will brake the new rings, plus the crank should also be checked for true. You might get by with new rings, rod and main bearing but why take the chance and end up with no engine at all because if the crank needs work it could throw a rod out the side of the engine

Hobby farm

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El Toro

05-20-2008 10:10:51

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Re: farmall engine repairs in reply to charley123, 05-20-2008 09:24:06

I think it would be difficult to reinstall the pistons from the bottom since a ring compressor is required. Those sleeves & crankshaft need to be measured for wear. If the engine has a lot of hours you should pull the engine since you will probably need cam bearings and this determines good oil pressure. The ring ridge needs to be removed with a reamer. Hal

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ScottyHOMEy

05-20-2008 09:51:03

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Re: farmall engine repairs in reply to charley123, 05-20-2008 09:24:06

Jim N's on the mark.

Yes you can remove parts from the bottom, but a) you my need to pull the head anyway for ridge-reaming or other stuff and b) it's not that big a deal to pull the head (though the expense of a head gasket is not negligible).

As long as your crank is in good shape and new bearings can be had to work with it, and your cam is in good order, ther's no need to pull the motor -- you can do it in-frame.

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Janicholson

05-20-2008 09:32:40

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Re: farmall engine repairs in reply to charley123, 05-20-2008 09:24:06

I do not believe that is possible. They could be taken out, but in pieces. The head needs to come off to ridge ream the sleeves any way. If there is enough wear to warrant new piston rings there is enough wear to ridge ream, (best to pull the sleeves and replace with a Kit. From this site, or others, The process is not painful. JimN

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charley123

05-21-2008 08:26:02

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Re: farmall engine repairs in reply to Janicholson, 05-20-2008 09:32:40

Could I still pull the oil pan to observe/inspect the rods/bearings from below and help determine what might be wrong? And then if I'm feeling brave for a complete engine overhaul...what kit would I need for a super M? And of the kits I saw, none of them had "bearing" with them. Where do I look for those? I'm a bit nervous about opening up the engine with all the other posts I've seen on this site of all the problems people have with their "projects"...I am mechanical in nature, though never having performed a task as engine rebuilding. I have observed an engine rebuild on DVD and it seems stright forward but I'd hate to make a pile of parts and scratch my head.
Another question, if the tractor has a F-11 loader on it...do I have to remove that before the engine overhaul? Or if I split the tractor to get the engine out? I think I'm scratching my head now.

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Janicholson

05-21-2008 16:01:56

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Re: farmall engine repairs in reply to charley123, 05-21-2008 08:26:02

Charlie, Go ahead and take it apart. Take digital pictures of each step. I would take off the loader for ease of access. Buy the service manual, (from here, or Binder Books, Or Ebay. The process is not difficult if taken seriously, cleam as you go, and place parts in labeled containers. Getting a text on engine rebuilding is a good first step. What is the real problem with it. We could assist in diagnosis if we knew. Kits are available here. The crank needs to be measured by a competant machinest to assess its condition. The engine will need to be taken out to get the crank out. Splitting the tractor (not hard, just serious) Start a new entry when replying, this one is getting two issues in it. JimN

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