Posted by Dave Speed on Wednesday, December 15, 2004 at 10:08PM :
In Reply to: Waking an old engine. posted by Robert N. on Wednesday, December 15, 2004 at 8:01PM :
Drain the engine lube, remove the oil filter; replace oil with some cleaning mix.
Remove the sparkplugs.
Let the engine sit a couple of weeks with a good dose of Kroil or PB Blaster down each plug hole - best to wait until you see the liquid levels start to go down in each cylinder. Heat helps, but be careful.
Just before you start the next step, give each cylinder a good couple of ounces of motor oil for lube.
Then tow it behind a *stout* vehicle (or tractor) and pop the clutch in high gear.
If you turn the engine over, don't try to over do it; try to start to get fluids flowing again.
If you get it to spin for 50', I'd back off and replace the crankcase fluids with cheap oil and see if you can get ignition. You may need to pull the head and massage the valves a little as noted above.
If this does not move the pistons, you have to face a full disassembly, which is not the end of the world, but is time consuming. I've loostened engines that looked solid.
Note: a fire extinguisher is always a handy tool in the garage; this is not the safest path.