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Stuck Pistons

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big_red_man

Member
My '26 McCormick-Deering 10-20 has a couple of pistons which are stuck. I've removed plugs and put a half-cup of ATF into each cylinder. My neighbor swears that if I'll put some brake fluid into each cylinder, it'll free them up. I haven't heard of that. Whaddya think?
 
i think ATF would do the same thing, you might want to try marvel mystery oil, how bad are the pitons rusted? did it sit outside with the exhaust off?
 
Soak them good every day for a week.
If they are still froze you will probably have to remove the oil pan and pound them out with a piece of wood.

You can try the brake fluid, it shouldn't hurt anything.
Open the oil pan drain plug and let whatever fluid you use drain out of the engine.
 
big red man,Build a fire in the cylinders BEFORE you start pounding with a hammer and wood block.
look through the archives on stuck engines and read my post on what to do. This will allow you to salvage more of the engine parts, than destroying the pistons right off from the get go.
If you would rather talk I will talk you through it. My # is 512-577-3837.
Later,
John A.
 
I was told by a guy that restired several old tractors to use a combination of brake fluid, Marvbel Mystery oil & Coke. Worked for me except one piston on an M. For it I had to finally chain the front of the tractor to the back of our forktruck, then using a 3"x3"x 12" block of oak & a hyd jack was able to forcce it & the sleeve up from the bottom by putting the oak block in the rod journal & jacking it out.
Luckily it didn't hurt the rod.
 
Pour kerosene on top of the stuck pistons and set them on fire. Make sure you're not near any buildings or have anything flammable on the tractor. The heat should loosen them. Hal
PS: I would do one at a time.
 
Brake fluid actually works very well- I freed up a stuck one in the flathead V8 in my Deuce dump truck by alternating Marvel & brake fluid, took about a week
 
I've tried every concoction I've ever read about on these forums, and even invented a couple of my own, and I can tell you that if those pistons are really, truly stuck, nothing short of breaking them and removing the pieces is going to get them out.
 
i totally agree with rusty. experienced all that b.s. also. have had to push out the sleeves and remove piston in pieces, and or peal sleeve off piston.in my experiences the thinner the viscosity fluid the better chances of it working. i have used wd40 in cyl. with head off and it would leak down.put in atf and it just sits there .have that happening since spring and atf is still there...not going down.water would be more benefit than that stuff.thats why i say its only a remedy for an engine thats just lightly stuck and the cyls. are not yet rusted.it gives you a good idea when you pull the plugs what to do.its faster to pull the engine apart than wait on some miracle postion to not work.so on that seventy year old engine better get the wrenches out and get to it and at it.good luck.
 
A friend used CLR to loosen a piston in a truck engine. He only waited 4 days.
SDE
 
Buy a couple cans of CRC Knocker' Loose or Areo Kroil Oil. Two of the best I have ever used, but a little pricy. I have heard of pouring diesel into ONE CYLINDER AT A TIME with a paper towel for a wick and lighing it. Once it burns out, try to move the piston. Note: I have only heard of this one.

CT
 
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