does not mater where the shutoff is water can not flow when it is off,in ou out. my thotes where radiators have hot water going into top of rad and out the suction sid of water pump. my heater works well with water flowing contrary to the manuals. my shut of is on waterin(from intake manifold,just ahead of therm.

Wouldn't you want the water flowing to the shutoff valve side of the core, so he heater core does not hot of water flowing to it or pressure against it when the valve is closed? 



Pat Fleischman

pete55bird is correct,i do not have older manual,but have shop manual1967ford it showes the pressure hottest water from intake manifold going into botom of heater core, and suction to water pump.  oposit to radiator pluming.will have to change the heater hook up on the ranchero learned something to day. thanks pete

Hi. The 57 shop manual illustration is water pump to the top. Pete

mine is intake hose goes to the top heater line water pump suction is botem. my ranchero has the basic heater but it workes well defrost works well. but i am sure we will hear from others if we are incorrrect, but thats the fun ofit all. cliff

What is the proper way to hook up the heater hoses to the heater core?  57 ford ranchero.  water pump outlet to upper core nipple, manifold return to lower?

thanks