I had problems with my CHG in my 7MGTE, I was getting compression into my water jackets causing water to spew out of the radiatior. I had my block faced, Oringed, head was also faced. I used hylomer spray on both sides of the gasket and tightened up to 75lbs. I think it was leaking around the CHG and the head. Im using A stock HG with the orings still in place.