SOmeone else mentioned that but I don't understand-
AIr gets trapped in the cooling passages in the head and won't just move along with the coolant?
But wouldn't that air expand? SOmeone suggested that bad head gasket would cause air at the radiator cap so i put a rubber glove on the cap and let it run for a while, no air at the cap.
I'm leaning toward a cloogged radiator but I need to drive it ang get it hot for another test.
WIth the truck idling in the yard and reaching a temp of 185 or so the outlet side of the radiator is cold.
