Yeah it is the 2" pipe on the head side.......and the thing that is killing me is that I put a new water pump on along with viscous fan clutch, timing chain, tensioner, had the head off to have new seals, guides, and valve job done, an a bunch of other little things done that needed attention.

I got the head back from the shop with the pipe in it just like I gave it to them and I am betting that it did not get sealed and tapped in proper. I was so careful to go over everything and double check during and after installing everything and somehow that little pipe was missed.