Thanks for the feedback Bill. I do have the deluxe heater with thermostatic control.
I did pull off the other hose and still had no flow with the hose raised above the radiator (engine running). Both hoses flow water if lowered below the top of the radiator.
My assumption on water flow to the heater is, the water pump pulls water from the lower radiator hose would also have to pull water (return) for the heater. Maybe this is not correct?
Scott.
