Locked Engine

JBurch said

Do you want to save them? Is it still in the car? If you wish to save them and in the car, LOTS of PB Blaster, a mash hammer (about 48 oz) a 2x4, or 3x3 piece of hard wood (several, they may splinter) , with the heads off, soak each cylinder VERY liberally, wait a day, wack each one with hammer and block of wood.

Out of the car, on a stand, take oil pan off, loosen rod caps a little; wooden dowel and hammer from back side, flip over hammer and wooden block from front side.

Don't want to save pistons, 1/2 inch steel bar, hammer, take rod cap off, break crown off piston from back side, drive piston out 1/2 inch bar on pin boss.

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THIS is pretty much exactly how I would get stuck pistons out when I worked at a shop years ago. Chances are they are the pistons are toast. I did manage to get a few sets out like this and in every case they were paper weights. If they are lightly stuck it is one thing but if it sat open for any & all moisture to wreak havoc I would just take the hammer and blocks of wood to them. I

In a very drunken stupor decades ago I helped a friend with a sbc in his 4 speed Nova. Heads were off. Soaked the snot out of them. Threw several hundred pounds of weight in the trunk hoping this would help prevent the tires from just skidding. Hooked it to his Pops truck and took it for a drag....Repetitive shocks from repeatedly dropping the clutch did free them up. All of the pistons were toast, but we had a hell of a good time so.....