920 heads

Is it cracked on the outside corner of the water jacket? Did the pressure test it?
antifreeze seeps out from that corner of the head with the engine running. I know the corner end manifold bolts are in the water jacket and the bolts had sealer on them. that's where I first thought it was coming. but know such luck. The head has no other leaks . the gasket is sealed with nothing blowing out the gasket area . No compression leak at all on that cylinder . head rested good on the dowl pin and laid flat to the block .
My buddy is a pro and welding cast iron so we are going to give it a go . have nothing to loose.