Coolant leak -hydro locked engine

It would have to go wide open to do that. I have been in a car that did that, but it dropped a valve and busted a dime sized hole in the head. Good that it did not.

RRR, I understand what you are saying about the welding, but they are costly heads and what do you have to lose by making a good attempt? Grind lightly around the bad area, probe into the head, and you may be able to figure out if it is one thin spot or not. I sure as heck would not toss them without some quality, in-depth examination time.