Since we are on this subject, I have not drove my truck in a long..long time, I have let it run..sometimes for 1/2 hour. I never see much flow in the Radiator,I even turn the heat on,the heat works pretty good,it gets warm in the truck,but 2 things I have noticed...not much flow in the radiator and the return hose from the heater coil never really gets that warm. Is this normal..or should I do a flush.
