I have a 216 of unknown history which is locked up.
I pulled the head and found that there is no evidence of a ridge at the tops of the cylinders. That is inspiring.
I drained the oil and mostly water poured out. Not so inspiring.
I was able to remove all of the lifters. Five of them required a lot of penetrating oil, heat, and tapping, but over 3 days of monkeying around with them, that came out. The bottoms of the lifters have no wear patterns on them. Again, inspiring.
I still couldn't get the crank to turn more than about an eighth of an inch.
I poured acetone in each cylinder to create a pathway for the automatic transmission fluid which I added later. The transmission fluid seeped down in 3 of the cylinders, but not the others. I mopped up the transmission fluid and added penetrating spray which I used to free up the stuck lifters.
I used a block of wood and a hammer to tap on the top of the pistons to try to get even a tiny bit of movement to help create space for the penetrating oil to make its way down.
I will keep you posted when I make progress.
I certainly welcome any tips to free this engine up so that I can remove the clutch, flywheel and bell housing so that I can put it on an engine stand and take the oil pan off to see what's inside.
