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Farmall & IHC Tractors Discussion Forum
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frozen pistions

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Steven Kitchens

05-21-2008 16:34:39




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I have a 1941 farmall H that has frozen pistions i have soked them for a month with every thing suggested and rocked it every time i have walked by it and tapped from the bottem and they are still are frozen any suggestions to free them with out takeing out the engine




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1fortyfanatic

05-22-2008 18:54:22




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 Re: frozen pistions in reply to IaGary, 05-21-2008 16:34:39  
That is a really good idea.

dave



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1fortyfanatic

05-22-2008 18:05:38




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 Re: frozen pistions in reply to Zach Bouchard, 05-21-2008 16:34:39  
Steven, I am of the have to have heat camp. My solution would be to take the head off, and the oil pan. Remove the piston rods from the crank, and turn the crank as needed / can. From the top, I would use a propane torch to heat the piston heads (not too hot), then remove the flame and soak the heck out of the head with wd-40 and silicone lube (will smoke and may even flash to flame so take appropriate precautions); but the idea is that as the the metal cools the thin penetrating lube will getted sucked down and loosen the bond. Then get the biggest piece of wood block you can fit in the cylinder and place it on top of the piston head, and apply the BFH to the wood. I've managed to bust loose some of the most rusted things you've ever seen using this method. Good luck.

Dave

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Steven Kitchens

05-22-2008 14:56:49




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 Re: frozen pistions in reply to Steven Kitchens, 05-21-2008 16:34:39  
Thanks to all yall who replied it gave me more ideas to try. Im 17 and this is my first tractor and am planing to take it to the ag mech. show in january thanks agin



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Bob Kerr

05-22-2008 06:34:13




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 Re: frozen pistions in reply to Steven Kitchens, 05-21-2008 16:34:39  
I have a 28 chevy 1 ton with a stuck engine. I was told last week by a guy who does babbiting on old engines that black molassas and water will take the rust out and not hurt alum pistons or the cast iron. He said mix 1 part molassas and 6 parts water. Going to try it myself. Another thing that works is heat the cylinder with a torch and freeze the piston with liquid propane or some kind of liquid gas.

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El Toro

05-22-2008 03:53:22




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 Re: frozen pistions in reply to Steven Kitchens, 05-21-2008 16:34:39  
I would try what Ben suggested. Remove anything flammable and away from any building. It takes that heat to free them. Just do one at a time and start tapping on the piston. Hal



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ben mc

05-22-2008 01:19:07




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 Re: frozen pistions in reply to Steven Kitchens, 05-21-2008 16:34:39  
i got my case DC-4 un stuck buy puting gas in the cylender set it on fire let it get nice and hot put it in top gear and rocked it to my surprise i moved slow at the start then all the way around i know its not the best way in some peoples eyes but worked for me



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James Williams

05-21-2008 19:41:11




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 Re: frozen pistions in reply to Steven Kitchens, 05-21-2008 16:34:39  
Steven,sounds like aluminum pistons and iron sleves,and a chemical reaction,Either use patience or a big hammer,and usall the hammer wins

jimmy



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RedJohn-2

05-21-2008 18:17:43




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 Re: frozen pistions in reply to Steven Kitchens, 05-21-2008 16:34:39  
Steven, Recently I had the same problem with one cylinder in a 1940 H. The piston was about half way down, and the sleeve was extremely rusted above the piston. I used a ridge reamer as far down as I could, then used a cylinder hone for a LONG time. I kept ATF/Acetone 50/50 in the cylinder all the time. Then I took a 1" rod about 2' long, fished it up into the bottom of piston (rod cap already removed), placed floor jack under the 1" rod and jacked the tractor up in the air. I let it sit that way a day or two, then placed a wooden block on top of the block and knocked the hell out of it with a BFH. It finally came loose. So I won.

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JT

05-21-2008 17:50:09




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 Re: frozen pistions in reply to Steven Kitchens, 05-21-2008 16:34:39  
Steven,
I am not trying to be a SA on this, but the engine did not lock up over night or even in a month. If you are trying to get the pistons out for a low dollar rebuild, just keep waiting. I had one that was lock, had no head, had been exposed to the elements, in a shed, though, I put tranny fluid in it, let it sit for a couple months, took off rod caps, a long wooden dowel, put inside bottom of piston, tapped with a BFH, 3 about fell out, one was a bugger, but I got it out, destroyed the piston doing it, but patience is the best thing. If in a hurry, and you are doing new sleeves and pistons, you can blow a hole in the middle of the pistons, it will relieve some of the pressure and help get them out, then pull your sleeves, put new ones in and you are good to go. Every one has a differant idea on how to do this, but this way has worked for me on a couple of frozen engines.
Jim

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Bernie Steffen

05-22-2008 18:16:00




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 Re: frozen pistions in reply to JT, 05-21-2008 17:50:09  
I have found one good way to unstick an engine is use hydraulic pressure on top of the piston. Either make a fitting to go in the sparkplug hole and hook another tractor hydraulic up to it or I have also used a grease gun to good effect. Loosen valves up first so all valve stay closed. Bernie Steffen



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