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Farmall & IHC Tractors Discussion Forum
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M pistons-where do I hit them?

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sccwells

05-25-2004 22:42:33




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I am trying to unstick the pistons on my M. Where do I hit them? I have the oil pan dropped but am unsure where, how and with what to hit them with to unstick them. Help!




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El Toro

06-04-2004 07:17:31




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 Re: M pistons-where do I hit them? in reply to sccwells, 05-25-2004 22:42:33  
Did you ever unstick the pistons on the Farmall M?
If you haven't freed them. remove the head and pour automatic transmission fluid over pistons.
Let soak for a day or two. Remove rod caps and
use a piece of 2X2 oak or maple wood to drive against the rod.

I restored a Farmall A that had the pistons
stuck and that is how I got the pistons out. The A has wet sleeves and some of them came out with the pistons still stuck so I use a torch to heat
the sleeves and the pistons came out easily. I put in a new sleeve kit with new pistons and rings. I used the same connecting rods. I don't think the oil was ever changed in this tractor. It ran like a new one when started and I plowed my garden
with it. Hal

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Alan

05-26-2004 09:52:45




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 Re: M pistons-where do I hit them? in reply to sccwells, 05-25-2004 22:42:33  
Well I helped a freind get a farmall loose that was stuck for over 30 yrs. He said, I think we met our match. I am a Gibbs dealer. I removed the head, took out the thick portion of rust, sprayed gibbs in the engine, and took a round piece of Aluminum about 1/4" smaller than the bore and started tapping. As the gibbs worked in , I would spray more. within two hours I was turning the engine over. We both were amazed. Good luck

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Red Raider

05-26-2004 05:53:45




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 Re: M pistons-where do I hit them? in reply to sccwells, 05-25-2004 22:42:33  
A 10" section of heavy wall steel pipe to fit just inside the bore, with a piece of axle welded to the center and bridged makes a good persuader. All of the force is distributed at the rings instead of the piston pin. Worked well for a stuck 450.



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fox

05-26-2004 05:29:15




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 Re: M pistons-where do I hit them? in reply to sccwells, 05-25-2004 22:42:33  
If the head is still on it, heat/warm some diesel fuel and get it in the spark plug holes.
Then drain the coolant and connect it to a water heater and get the block warm.
It usually loosens them up.



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Jon

05-26-2004 07:33:07




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 Re: Re: M pistons-where do I hit them? in reply to fox, 05-26-2004 05:29:15  
HI< FOX are you saying connect a block heater or fill the block with hot water from a water heater I am really interested in your idea I have an old cletrack that has a contenental in it that I need to get un stuck. THANKS JON



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fox

05-27-2004 17:48:58




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 Re: Re: Re: M pistons-where do I hit them? in reply to Jon, 05-26-2004 07:33:07  
Fill the block with hot water from the water heater. Let it run/circulate till the block is as warm as you can get it.
This has worked for me with an Olds 455 and a 400 Mopar.
Also the warm diesel fuel in the cylinders will help.



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Alan S.

05-26-2004 04:54:16




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 Re: M pistons-where do I hit them? in reply to sccwells, 05-25-2004 22:42:33  
It would be best to hit them on the journal of the piston rod. Use a block of wood so you don't damage anything. Take the rod caps off and you should be able to work the crankshaft into a position so you can get a good wack at them. Make sure that you take out the rod bearing. If you don't have the head off, you should take the spark plugs out so that you won't be trying to compress the air in the cylinder

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nebraska cowman

05-26-2004 04:30:32




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 Re: M pistons-where do I hit them? in reply to sccwells, 05-25-2004 22:42:33  
I use a piece of 7/8 shaft and work around the outside edge with a 4 pound hammer. I real hard cases I have used a piece of heavy wall pipe that just fits in the cylinder and a bigger hammer but this is after I have the rod loose from the crank. If you break something, don't blame me. I didn't stick it!



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Dick Davis

05-26-2004 03:52:34




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 Re: M pistons-where do I hit them? in reply to sccwells, 05-25-2004 22:42:33  
Great subject line! Very concise use of words.



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BillD

05-26-2004 05:18:26




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 Re: Re: M pistons-where do I hit them? in reply to Dick Davis, 05-26-2004 03:52:34  
Drop the rod caps Pull the head Soak a day with diesel then take a wood block that will contact the outside of the piston, DO NOT CONCENTRATE ALL OF THE FORCE ON THE CENTER, a few sharp raps with a large hammer should do it



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