Half and half engine air compressor

[Frank S]

Yepers 36" with a 12 lb'er slamming down on it as hard as a 200 lb old guy could swing it, come bleed or blister somethings going to give. Actually I didn't hit it all that hard just one handed the hammer the first little love tap and it moved about an inch on the flywheel. The impact could rock it back and forth but just couldn't quite overcome the bond. the KBS Rust blast sure did it's job as almost all of the rust deposit was gone and nothing left of it but some black goo.
I couldn't make a complete 360° revolution just about 320° due to the # 3 piston issue
You could be correct about the piston being separated.
I have an 85 Toyota SR5 that I drove for over 2 years on 3 cylinders, it never knocked or had much of a vibration just 1 totally dead chamber last August I built up an replacement 22 RE for it .020" bore .010/.010 on the crank .008" off the head, decked .004" squared and trued the rods. re-balanced the crank rods and pistons assembly to 6000 RPM . what machining that I didn't have tooling set up for was farmed out to a friend of mine who now owns much of the equipment I sold before my overseas move. all and all just over $2000 spent on parts and machining for the engine, which now has a little over 40 K miles on it in under a year most of the time having to pull loaded trailer.
I finally got around to scraping out the old engine the dead cylinder had popped its crown much like you said. The top of the piston was hammered against the valves and the lower part had been happily riding up and down for years before I had even got the little truck