I don't think it should take several months to free an engine. It should work loose in a few days or maybe a week.
I have had good success with seafoam deep creep. Spray down the top of the pistons every day. But also I would spray down the lifters and the whole underside of the engine.
Also, you need to wiggle the engine a little bit each day, even if it doesn't feel like it's budging. A prybar on the flywheel works well, but some people might pound on the top of each piston with a 2x2 and a nine pound hammer. Just don't break anything.
Eventually, after a few days, you will notice the engine move a fraction of an inch. Then you're almost home free, after a couple more days it will really start to move.
Last edited by Stove; 03/13/2021 3:07 PM.
