I got to thinking about the heater location of the return and intake hoses.
Think About it.
One hose is at the back of the block ant one of the furtherest points from the cool water from the radiator as is the temp Gage. Also, water returning to the radiator is forced up and into the radiator from what ? the cooler water( remember the water pump is connected to the lower radiator hose) being pushed thru the head by the pump.
So does it make sense that the designers of the heater would have colder water going thru it or get water from the hot source and return it to the cooler?
I am going to measure the temp on both hoses by hand and by the Lazar temp Gage.
Which one you want to bet on is the return hose? I bet it is the one from heater to above water pump.
Lou