Old Syko, I have thought from the beginning it was probably a head. It has been hooked up to a diagnostic computer and it has no codes. It's about $700.00 to do the heads. I wanted to do it, but have been told its a waste of money. I don't know which way to turn!!!
BTW, when it rains, steam will come out of the grill. That is also the area where you can smell the antifreeze. It has been pressure checked.