Old engine stuck
01-23-2007, 11:55 PM
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RE: Old engine stuck
Are we talking old Cox engines? I let WD-40 set for a few minutes, then disassemble and clean with GOOP hand cleaner and hot water. Actually, that's pretty much what I do for all the engines I get that are seized up, except that they would normally get soaked in hot water before disassembly. Avoid harsh chemicals whenever possible!
01-24-2007, 12:12 AM
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RE: Old engine stuck
MEK is the most powerful solvent that I know of, it seems to be able to break anything down. Hoppes gun cleaning solvent is formulated to clean even the funkyest old gun barrels, works well on our stuff, too.
Heat is a powerful tool, also. You will need it to change out old bearings and liners that are stuck to the case. I use a propane torch, some guys use an oven.
Heat is a powerful tool, also. You will need it to change out old bearings and liners that are stuck to the case. I use a propane torch, some guys use an oven.
01-24-2007, 12:30 PM
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RE: Old engine stuck
I've been working on this for a while. I see now there's some rust at the top of the cylinder.
What should I do now?
Beeza
What should I do now?
Beeza
01-24-2007, 01:39 PM
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RE: Old engine stuck
Remove the plug and backplate and squirt some fuel in it. Let it sit for a few minutes and try to turn it over with a prop on it. DO NOT FORCE IT. If it is old castor, the fuel will cut it and allow it to turn over. If it is rust, you will need to take further action.
What kind of engines are they?
George
What kind of engines are they?
George
01-24-2007, 01:48 PM
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RE: Old engine stuck
The one with the rust is a Supertiger. It was run one time a long time ago. The Cox is just stuck--no rust there.
Beez
Beez
01-24-2007, 02:12 PM
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RE: Old engine stuck
Good news--I got it unstuck. After disassembling and soaking all night in WD40, then
soaking in hot water, then finally in acetone, it was still stuck. I mounted it in the engine stand and GENTLY tapped the piston top with a short dowel almost the size of the cyl bore. It gave way, then I added WD40, mounted the prop and gently rotated it until smooth. now I'll take it apart and clean and oil it.
Thanks for all the help guys.
Beeza
soaking in hot water, then finally in acetone, it was still stuck. I mounted it in the engine stand and GENTLY tapped the piston top with a short dowel almost the size of the cyl bore. It gave way, then I added WD40, mounted the prop and gently rotated it until smooth. now I'll take it apart and clean and oil it.
Thanks for all the help guys.
Beeza
01-26-2007, 08:04 PM
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RE: Old engine stuck
It's easy. Next time give the wife your credit card and send her to the mall for about 3 or 4 hours. The spray the engine with WD-40 and pop it in the oven for about 1/2 hour. The heat will soften the crud and the WD-40 will work into the moving parts freeing everything up like nobody's business. Vent the smell out of the house, light a few of the wife's girlie candles and she'll never know.
Works on stuck Triumph and BSA motors too. How do I know this? Guess.
Works on stuck Triumph and BSA motors too. How do I know this? Guess.
