First post said it was good at speed, but heated up idle.
Later on, Stumpy says it was fine at idle and hot at speed (I think this is more likely correct).
On page two, the OP says with the original rad, fan, shroud, it ran great at 2 lines off of C, which says it hasn't always had a heating issue. Why the resistance to going back?
Just too many things that don't add up here for anyone to do much of anything.
