When freeing up a stuck engine.....

Ditto.

I've had similar results. One thing I've heard works but haven't tried yet is using those ultra-cheap 3-liters of the no-name brand cola. They still have the "oomph".

~Jason

 

Use any of these things. But take your time. I tap the pistons with the wood end of a heavy hammer. Not to hard ,your not trying to move the piston you just need to crack its hold. Now let it sit for a day or two. When you see the oil start to go down you will know its starting to free up. I tap each piston one time only. Take your time.

 

Take a piece of 2 x 4, stick it in a cylinder and then take a BFH and pound on it. Just unstuck a 312 YBlock that way (with the help of Kroil).

 

This does it for me too. Borax, water, and a drip charger.

 

Did you wont to save the pistons.