Help: Taking Seized motor apart.

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  #1  
Old 06-04-06, 10:48 AM
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Help: Taking Seized motor apart.

I have a Tecumseh TVM220 that came off of a Craftsman riding lawnmower.

The motor seized on me (not gonna make any excuses...I let the oil run out.)

I'm trying to take apart the motor and have gotten to point of taking the cylinder cover off.

The manual says that I have to turn the crankshaft so that the worm gear moves and then the cover will come off.

Well, that presents a problem since I can't turn the shaft.

Does anyone have experience with this?

Thanks, Johnny
 

Last edited by JohnnyO; 06-04-06 at 10:49 AM. Reason: Spelled word wrong
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  #2  
Old 06-04-06, 12:44 PM
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Pour a little Marvel mystery oil down the cylinder and let it soak overnight.
 
  #3  
Old 06-05-06, 03:50 AM
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I'm on my way to buy it now. I will put it in there today and let you know tomorrow how it did.

Thank you very much.
 
  #4  
Old 06-07-06, 05:48 AM
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still no luck!

I put in the Mystery Oil...nothing happened. It actually never drained out of the chamber.

Are there any other tricks that I can use?

Thanks,

Johnny
 
  #5  
Old 06-07-06, 09:34 AM
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No garantees that this will work, but try pulling the spark plug, and pouring in a ounce or 2 of good penetrating oil, let it sit overnight and then use a wrench in the end of the crank to try and break it free. Use a racking motion, back and forth. Marvel Mystery oil is great for many things, but it's not the best penetrating oil available, neither is WD-40. If the rod broke and has mechanically jammed up the works, no oil will break it free. Another possible angle of attack is from the bottom of the engine, by removing the oil pan and seeing if you can remove whatever has it locked up.
 
  #6  
Old 06-07-06, 06:13 PM
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Not to mention if the rod may be seized to the crank.
 
  #7  
Old 06-07-06, 11:42 PM
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You may or may not be able to remove the crankshaft, depending on the position of the rod, but if you can...remove it and try to knock the piston down into the crankcase with a wood block.
 
  #8  
Old 06-08-06, 04:18 AM
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Thanks

I will try these things tonight. Thanks so much for taking the time to write back.

Johnny
 
  #9  
Old 06-08-06, 05:05 PM
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Bob

If you're still fighting it here's something we've done on other engines.

Remove the pan to expose the crank and lower rod. Remove the rod cap nuts and the rod cap. Invert the engine so you're looking down into the bottom of the piston. Use a tin can and fill it about half full of dry ice. Add rubbing alcohol, let sit for about two minutes, it will get very cold very fast. Pour the cold alcohol into the piston. The piston will shrink and may free itself.

Only handle these materials with gloves and a great deal of caution.

Hope this helps.
 
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