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Best thing for freeing stuck 2 cylinder engines?

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B JDfarmer

05-03-2004 19:22:30




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I have a b jd that the engine is stuck. Whats the best thing to free these up?




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Brent

05-04-2004 07:49:12




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 Re: Best thing for freeing stuck 2 cylinder engine in reply to B JDfarmer, 05-03-2004 19:22:30  
I have freed up a number of 2cyl's using a product called Mooovit. It is the best penetrant I have ever found but it takes time. You can't be in a hurry. I GENTLY turn the flywheel or one of the rear wheels and then once the engine is loose, I can take the pistons out without taking the block off. Sometimes you can get away with hone and rings, sometimes not. Never, ever get the engine loose and try to start it, you should always take apart. The cooling system will be full of mice leftbehinds and the head could have a bushel of grain in it.

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Gord

05-04-2004 06:18:14




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 Re: Best thing for freeing stuck 2 cylinder engine in reply to B JDfarmer, 05-03-2004 19:22:30  
I have found that if you drain the crankcase and fill the cylinders with pure glycol antifreeze and let it sit for a while they come pretty loose in a few days. The antifreeze has the ability to go where even water can't for some reason and the acids and antirust chemicals eat away at the corrosion and loosen the rings up. The open crankcase drain lets the bypass out and lets you know that the glycol is getting by.
Most important though as Clooney says, is to pull it apart after and check for damage.
Good-luck whatever you do, Gord

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Clooney

05-04-2004 04:02:31




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 Re: Best thing for freeing stuck 2 cylinder engine in reply to B JDfarmer, 05-03-2004 19:22:30  
B JDfarmer, the best way I have found [I didn't say the easiest way] is to pull the block out pistons & all,, then place the block upright [rods down] on 4X4 blocks of wood,, then pour in about an inch of so of diesel fuel & let it sit for a while,, then light the diesel on fire & let it burn out,, then pour in some more diesel fuel & let it stand for a while,, then try pounding on the top of the piston with a block of hard wood & hammer.. If a little pounding doesn�t move the piston, then light the diesel again & repeat the above.. I have done many stuck engines over the years & have found the above is the absolute best way not to damage the engine farther or wreck pistons or gall cylinders.. If those cylinders are heated a few times with a bore fire the pistons usually come right out of even the worst stuck engines & the pistons are usually still good that way..

~You can get lucky trying to free them up without disassembly & have them come free but without a teardown there is just no way of knowing what internal damage is present so risk further engine damage when started..

~Even if you do free it up while assembled it will probably at least need rings & a cylinder honing anyway.

~It takes me less time to yank that block out than fooling around with filling the cylinder with whatever & the risk of bending a connecting rod or damaging a piston is minimized..

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john

05-03-2004 22:46:09




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 Re: Best thing for freeing stuck 2 cylinder engine in reply to B JDfarmer, 05-03-2004 19:22:30  
put about a can of pb blaster in each cylinder or fill them up which ever comes first. Then after about a week start every time you walk by with the tractor in the highest gear available getting ahold of a rear wheel and rocking the tractor back and forth for about 30 seconds./ I have found that usually withina week or so the engine will break free. Good luck.



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old

05-03-2004 20:52:53




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 Re: Best thing for freeing stuck 2 cylinder engine in reply to B JDfarmer, 05-03-2004 19:22:30  
I've had good luck by first filling the oil system full of oil and I do mean fill so you can't get any more in it then fill the cylinders with oil let that sit for a couple weeks. Drain the oil out of the crank case and let sit a week then top off the cylinders with turpentine. So far this has worked on all the engines I have played with. If it doesn't the press is just about the only way



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johndeeregene

05-03-2004 19:45:07




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 Re: Best thing for freeing stuck 2 cylinder engine in reply to B JDfarmer, 05-03-2004 19:22:30  
i have used several different ways to do it. some use diesel, sometimes works, some use wd40, sometimes works, takes alot of it, heard of using coke soda pop. never tried it, was always to thirsty. used a sparkplug that is drilled out an put a hydralic fitting on then uses another tractor to push the piston out. or put a grease fitting in an pump it full of grease with a greasegun, takes alot of time. but the one thing that i use most an always works except once, is a 40 ton press an a hard wood block an a small piece of steel plateing. the only time it didnt work was when i blew up the press trying to press out a piston. did finally get after several months of sitting in diesel an then the press. i have basically gave you every way that i have heard an told you what i use. it is always easier to do it with the block out though.
johndeeregene

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Harold

05-03-2004 20:39:26




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 Re: Re: Best thing for freeing stuck 2 cylinder en in reply to johndeeregene, 05-03-2004 19:45:07  
I second the motion made by johndeeregene. Harold



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