Originally Posted by T-bucket23
Look at the plugs, if one is real clean that will be the bad cylinder.
Good suggestion, except two from each cylinder bank were pretty sooty, and the other two from each bank were only lightly sooty.
I had someone suggest a leaking head bolt. Would it be possible for the coolant to run from a coolant jacket up the bolt and down into the headers? Might explain why no big puffs of white exhaust smoke? Just guessing here.
Might rent another coolant system pressure tester and pump it up and see if I can see any coming out of an exhaust port as I have the headers off right now do to the start of the tear down.
thanks again guys for the help so far