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Minneapolis Moline Tractors Discussion Forum
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Stuck engines

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Joe Z

12-21-2004 16:27:42




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When I started to work on my 445 a year or so ago, one piston was stuck . Boy, what a job. I also had to replace and purchase a block and of course, that block had 2 stuck pistons; WoW!!again lots of work and time to unstick the pistons.
Quite a few time now, I've read hear in the forum about tractors with stuck engines.
What causes this to happen to tractor engines? I would like to know so I don't ever make that mistake.
Thanks for your thoughts.

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John McLucas

12-21-2004 19:04:20




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 Water Causes It. in reply to Joe Z, 12-21-2004 16:27:42  
Moisture in the cylinder is the cause of stuck pistons. Moisture rusts the cylinder wall and sticks the piston rings. Moisture can enter through the muffler and exaust manifold or by other means. At least one valve is always open when your engine is not running so that will be the entry way for the moisture to get into a piston with an open exaust valve above it. The cure for this is to keep the exhaust covered and turn the engine over a few times at least once a month. Use a hand crank or starter. This keeps the pistons free as well as rotating the open valve to a different cylinder. The usual path to stuck pistons is rain water entering an uncovered muffler,a missing spark plug, or open carburator. Always keep them covered or better yet shed your tractor. If you can, start the engine and let it warm up at least once a month. If it is not running, use the hand crank and turn the motor over a few times monthly. I have seen old cars sit out in a field for twenty years with a good hood over the motor and they will hardly ever have stuck pistons because of the hood. For a non running engine that you plan to fix one day, it is good to put a tablespoon of engine oil into each spark plug hole and turn the engine over a few times. The best advice to avoid stuck pistons is to shed your tractor and turn the engine over once in a while. Better yet start it up.
JOhn

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LW

12-21-2004 18:30:51




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 Re: Stuck engines in reply to Joe Z, 12-21-2004 16:27:42  
Rain! and uncovered exhaust, a grease gun works great for unsticking the R and Z series, works on all the rest too.



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F MM

12-21-2004 19:37:23




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 Re: Stuck engines in reply to LW, 12-21-2004 18:30:51  
Tell me more about the grease gun method. Haven't herd that before.



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Kevin Moschenrose

12-21-2004 21:51:33




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 Re: Stuck engines in reply to F MM, 12-21-2004 19:37:23  
This is done by getting the valves closed by removing the rocker arm assy. from the head. Then take an old spark plug that will fit the head and knock out the center of it and weld a grease zerk onto it. Then you take the grease gun and pump her full of grease this will cause hyd. pressure and help lube the piston as well. Some times this will take a little time and others not so long. Go by so often and give it a pump or two. Of course the rods also have to be off the crank as well too.

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F MM

12-22-2004 17:26:24




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 Re: Stuck engines in reply to Kevin Moschenrose, 12-21-2004 21:51:33  
Thanks Kevin. I am going to try that next time.



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woodrow

12-23-2004 05:25:59




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 Re: Stuck engines in reply to F MM, 12-22-2004 17:26:24  
Hydraulic pressure of of a tractor works also. Same theory. Use an old sparkplug or the fitting off of a compression tester. Connect it to a hydraluic hose. Create two of these. If you are lucky you can find opposing cylinders. Connect hoses to another working tractor's hydraulic outlet and rock it back and forth. Dont forget to pull the rocker arm rack and push rods out of the hole first. This is a little less messy to clean up.

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