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What's the best way to go about freeing a stuck engine?

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John

08-24-2001 13:16:08




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I bought a John Deere M for cheap with a stuck motor. It supposedly had run a year ago. What is the best stuff to dump down it to try to free it up? And how long should it take, and should I try pulling it in gear to break it free or just rock it by hand and use a hand crank? Then, once I get it free, how should I get all the gunk I dumped in it out before I start it? Will just crankiing it over w/no plugs in it get most of it out? Thanks for any info.

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Mikey G

08-25-2001 18:02:49




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 Re: What's the best way to go about freeing a stuck engine? in reply to John, 08-24-2001 13:16:08  
I had to free up my 46Gm it was stuck for 15 years. I used ATF fill ed the cyl's through the plug holes put plugs in then used my steam cleaner on the block for about an hour put a bar on the fly wheel and worked it back and forth in about 5 min i had motion in 10 min. it was turning 360. Then i tore it down all the rings were stuck but the bore was ok

Good Luck

Mikey G



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cheg

08-25-2001 10:44:25




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 Re: What's the best way to go about freeing a stuck engine? in reply to John, 08-24-2001 13:16:08  
I have had good luck with PB Blaster. It is a catalyst that seems to do wonders. I purchased mine at Walmart.

I once looked at a JD-D that was in excellent original condition. I turned the flywheel and heard alot of metal clanging. The owner tried to free the engine by pulling it in gear. I always take my time freeing an engine. The last one I broke loose took two days and alot of rocking by hand. If I can't get it this way, I tear it down. Good luck!

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Iowa Farmer

08-24-2001 16:04:27




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 Re: What's the best way to go about freeing a stuck engine? in reply to John, 08-24-2001 13:16:08  
Well, There is alot you could use. About any kind of penetrating oil, Diesel fuel, alcohol..... Those all would work. We usually use heat to unstick them. There is one thing that is sposed to work the best, but in legal terms it is considered a biohazard (It uis labeled as a carcinogen) and is not the safest thing to use. Good Luck!



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Matt

08-28-2001 18:56:10




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 Re: Re: What's the best way to go about freeing a stuck engine? in reply to Iowa Farmer, 08-24-2001 16:04:27  
The best way to do it would be to mix up a little bit of everything. I would use a little diesel fuel, motor oil, PB Blaster, Sea Foam(buy it at any NAPA) and fill the cylinders up unitl it is filled to the spark plug hole. Then let it sit a few days and rock it back and forth in gear. IF this does not work pull the head off and pour brake fluid or atf in each cylinder andlet it sit a little while and then take a 2X4 about a foot long and thump each cylinder a few times by placing the wood on the pistons and hitting it with a hammer a few times and then try rocking it a little and do this every day until it breaks lose.

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KWB

08-24-2001 13:47:12




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 Re: What's the best way to go about freeing a stuck engine? in reply to John, 08-24-2001 13:16:08  
If you look in the archives I think you will find a lot on this subject. In my opinion, the best way to free a stuck engine is to tear it down and press loose the pistons. Then you don't risk damaging anything and you find out the true condition of the engine.



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AL

08-24-2001 16:15:21




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 Re: Re: What's the best way to go about freeing a stuck engine? in reply to KWB, 08-24-2001 13:47:12  
I use PARSONS AMMONIA



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JMJ

08-24-2001 20:06:31




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 Re: Re: Re: What's the best way to go about freeing a stuck engine? in reply to AL, 08-24-2001 16:15:21  
Kroil works great used it on a 50 put it in the plug holes enough cover the pistons soak a few days then use a pry bar in the fly wheel carefully on the 50 we bolted a 4 foot square shaft to the two threaded in the fly wheel



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Donwisc

08-24-2001 18:03:37




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 Re: Re: Re: What's the best way to go about freeing a stuck engine? in reply to AL, 08-24-2001 16:15:21  
One trick you might try after you have soaked the pistons for awhile is fill the the cooling system with hot water. This could expand the cylinder walls enough for the penetrating oil to work and may actually free the pistons. This worked for a buddy of mine who had to free up a IHC H. After you get it free I would take out the pistons to make sure you dont have cyl wall damage or broken rings. Good luck and let us know what worked. Don

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