I work for for a non-profic organization. We have a 95 nissan 2.4L pickup, and one of the guys drove a fair distance while overheating because of a coolant leak. He did not quite make if back before the truck died. At first I offered to do the work on it thinking maybe it just needed a new head gasket and some machining on the head surface. But I did a compression test and 2 cylinders were around 30 and the other 2 around 40psi. Also there is coolant in the oil.
Given that the pressure is so low do you think there is much of a chance that the head is not completely warped and needs to be replaced. Is it unlikely that there would be damage to the bottom of the engine, cylinder walls, pistons or warped block? I know one cannot say for sure until the head is removed but I would like to avoid wasting the time because if the truck needs a new head or worse they are gonna just junk it.