Im gona go look at it tomorrow. I would think no compression on all 4 would be a warped head. Block damage would be limited to the cylinder and have to be extensive since diesel blocks are built stronger than the gas ones. The guy doesnt seem to know too much about it so im gona take my trucks battery and see if we can turn it over. Could be a broken timing belt from sitting after getting so hot. Those belts go through alot of stress with 21:1 compression and if its been heated and could have oil on it.. thats not uncommon. Thats how mine broke, oil soaked the belt.