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Tool Talk Discussion Forum

free cylinders with grease

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Wayne M Kittler

10-02-2003 09:12:30




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In the IH group, the guys were talking about freeing cylinders on a Farmall 10-20 using a grease gun for pressure. What type of tooling do you need and what is an accepted procedure for attempting this on a stuck engine ?




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Dan in Ore

10-02-2003 20:41:09




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 Re: free cylinders with grease in reply to Wayne M Kittler, 10-02-2003 09:12:30  
If you use the grease gun method, don't use grease. Fill the grease gun with penetrant. The pressure generated will force the penetrant around the piston and loosen any rust that may be there. The word here is PATIENCE. Don't expect it to move immediately. Take your time and the end result should be what you wanted. Give it a pump on the grease gun every few hours but don't overdo it.

The spark plug on a 10-20 should be 1/2 " pipe thread so no need for an adapter just use pipe fittings to get to the size you need for the grease fitting.

This method has worked for me.

Dan

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Mark

10-09-2003 20:40:29




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 Re: Re: free cylinders with grease in reply to Dan in Ore, 10-02-2003 20:41:09  
Last summer I fought with a Ford Bobcat engine with frozen pistons. Penetrants took care of 3 pistons along with a block of wood and a 4 lb. sledge. But the last piston did not come ot until I dilled many holes in it and broke it apart. With the holes it came apart fairly easily. The engine had sat with water in the cylinders for about three years. I wound up having 3 of the cylinders sleeved and rebored. The rust was very deep. I hope this helps.

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hjp

10-05-2003 21:06:50




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 Re: Re: free cylinders with grease in reply to Dan in Ore, 10-02-2003 20:41:09  
this is the HARD way,I freed my dads flat head '50 lincoln with a squirt of "P B BLASTER" IN EACH HOLE AND WAITED AN HOUR.



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Ludwig

10-06-2003 12:57:52




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 Re: Re: Re: free cylinders with grease in reply to hjp, 10-05-2003 21:06:50  
Depends on how long your motors been stuck.
My '28 Farmall sat for 35-40 YEARS.
Its had PB Blaster and WD-40 in it alternately for 3 years, hasn't moved an inch yet. Periodically I swab the cylinders out, put a block on the piston and beat it with a sledge. Still no movement. Maybe next summer on some good hot day I'll try grease.



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Bus Driver

10-02-2003 15:40:56




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 Re: free cylinders with grease in reply to Wayne M Kittler, 10-02-2003 09:12:30  
Some grease guns claim to develop 10,000 PSI. But to echo what the others have posted, the potential for engine damage is great with the grease gun method. There are other methods which offer greater protection from damage. The potential problems outweigh the potential benefits.



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JOHN (LA)

10-02-2003 11:21:50




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 Re: free cylinders with grease in reply to Wayne M Kittler, 10-02-2003 09:12:30  
Like bob said you may crack head.
I saw it done once but in a different way!! Take the motor completely apart. Crank out if you can get to rod bolts!! Get a piece of heavy sheet iron and cut or drill holes to bolt to block. Use spacers to take up for head bolt length. drill a small hole and tap or braze a fitting to adapt grease gun. Use your old head gasket; torque down and apply grease. The only trouble is if you have more than one piston stuck you have to make another plate as bolt holes may not match.
Remember there is a lot of force at work here. If it will not break loose do not try to do it all at once. The old timer I saw do it had the motor out. He turned upside down sprayed penatrating oil around piston and applyed grease. Little later more oil one more shot grease. Took the old man a couple of days but he did what others had tryed and failed.

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Bob

10-02-2003 09:28:07




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 Re: free cylinders with grease in reply to Wayne M Kittler, 10-02-2003 09:12:30  
You connect a grease gun to the sparkplug port on the stuck cylinder, using an adapter designed to connect a compression tester, or make your own by welding or brazing a fitting that will fit the hose on youy grease gun to the metal part of an old sparkplug that has had the porcelain broken out of it.

Extreme caution is in order, as a hand grease gun can generate 2000, even up to 5000 PSI. Multiply this times the surface area of a 4" piston, and you are dealing with a force of 25,000 to 63,000 LBS., or more. The piston may come loose, or you may break the head, block, or piston, or bend a connecting rod, or even the crankshaft, if the piston you are forcing down is still connected to the crank, and there are other pistons stuck.

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