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Stuck pistons

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Don E. Foster

03-21-2001 07:27:32




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How long does it take for Pepsie to cut the pistons loose? The motor had been stuck for about a year. Thanks




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j.l.

03-24-2001 08:47:50




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 Re: stuck pistons in reply to Don E. Foster, 03-21-2001 07:27:32  
Don; there are two things i use to free struck engines. both are cheap and they work. automatic transmission fluid or marvels mystery oil. marvels is a top cyl./valve lub. either of these will soak stuck engines free in a few hours or days depending on how tight the engine is siezed. the important thing is don't force the engine let the oils do the work. forcing can break the rings and damage the ring grooves,pistons and cyls. just remove the plugs pour a few ounces in the cyl's and let it soak and some more next morning. it will do the job,i've used this for years.

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Glenn

03-22-2001 19:51:20




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 Re: stuck pistons in reply to Don E. Foster, 03-21-2001 07:27:32  
Liquid Wrench has worked OK so far for me. It's not very fast, but it does do the job. You've just gotta soak it really well every day or so. Like Robert said - it's cheap(less than $2.00 per can) and is readily available. I get it at Wal-Mart and usually buy three cans at a time.



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Robert in W. Mi.

03-22-2001 15:25:00




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 Re: stuck pistons in reply to Don E. Foster, 03-21-2001 07:27:32  
Here's what i've found to be the best to by far (to un-stick something) and in this order!! Kroil (very expensive) Blaster (i get this at NAPA) Liquid Wrench (This can be found all most every place) These work so much better than anything else, i no longer waste my time with the others!! Why do people mix kerosene and diesel??? All kerosene is, is slightly more refined diesel with out the wax in it!! All diesels will run just fine on either, but the kerosene doesn't have the wax to lube the injection pump. Robert

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steve

03-21-2001 19:31:53




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 Re: stuck pistons in reply to Don E. Foster, 03-21-2001 07:27:32  
couple of WD-40 spray cans from NAPA or WalMart will also do the trick. Easy to shoot down the spark plug holes also.Let it set for the week.



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farrell

03-21-2001 14:12:13




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 Re: stuck pistons in reply to Don E. Foster, 03-21-2001 07:27:32  
I freed up pistons on my WD with a mixture of kerosene and diesel fuel. The spark plugs were removed and I poured some in on top fo the pistons for several days. After several days we rocked the tractor in 4th gear and the motor turned freely.



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Larry CA20581

03-21-2001 10:40:42




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 Re: stuck pistons in reply to Don E. Foster, 03-21-2001 07:27:32  
Don I do not know about using "Pepsi",to free up stuck pistons,but I would use "Marvel Mystery Oil"I have been using it for years with Marvelous results Ha! Larry



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Tom

03-22-2001 06:14:21




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 Re: Re: stuck pistons in reply to Larry CA20581, 03-21-2001 10:40:42  
Don,
Never tried Pepsi but I've also heard marvel mystery oil works good also have heard that brake fluid helps loosen it up too. Good luck



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Ted

03-23-2001 15:01:26




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 Re: Re: Re: stuck pistons in reply to Tom, 03-22-2001 06:14:21  
Ever hear of "when everything else fails?" Well when it does, I use an adapter kit I got from my auto parts store that is used to apply air to a cylinder via the spark plug hole. I used a reducer on the air end of the adapter in order to install a grease fitting.Screw the adapter into the cylinder and tighten firmly ,like you would the spark plugs, loose the valve rocker arm assembly and insure the valves are closed for that cylinder, then start pumping in the grease.The gun delivers about 1300 PSI. I never had one fail to move yet.
I sometimes add oil first to the cylinder to help lub and fill the cylinder bore- cuts down on the grease needed. Good luck.

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Mike

05-19-2004 15:15:19




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 Re: Re: Re: Re: stuck pistons in reply to Ted, 03-23-2001 15:01:26  
I haven't tried this but reading the above posts gave me an idea. How about using your favorite Penetrating oil like WD40 (it evaporates) or MDSO (Chain lube has this) and then applying high pressure air using the sparkplug adaptor (thanks Ted). The high pressure should force the oil into the spaces around the piston and free her up quicker. (You'd have to releave spring pressure on the valves to make sure they are closed.) You could even set your compressor on 40# and just leave it hooked up. That would apply constant pressure on the oil. Who knows, when you go back in the barn in a few days you might find the piston has been moved by the air pressure and you are done!

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