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Jim/GA · 03-28-2018, 11:50 AM

My S/W Town Sedan was fitted with a heater when I bought it. The car came from the Chicago area, so they needed heat.

My previous owner seemed to know what he was doing. He installed a small 12 volt electric pump in one heater hose to improve circulation through the heater core. He also had a thermostat on the radiator side of the hot water heater outlet.

When the fan and the pump were switched on (they shared a common switch) that heater would put out a lot of hot air. It was nice.

I am assuming that this configuration was arrived at by trial and error, where he first tried to use only what the vendors offered and did not like the amount of heat that came out of it.

Having the thermostat in the upper hose puts some back-pressure on water going out of the engine and to the heater. That helps. But I think my previous owner decided he needed more.

I hope this helps.

03-28-2018, 11:50 AM	#2
Jim/GA Senior Member Join Date: May 2010 Location: Young Harris, GA Posts: 1,815	Re: Hot water heater query My S/W Town Sedan was fitted with a heater when I bought it. The car came from the Chicago area, so they needed heat. My previous owner seemed to know what he was doing. He installed a small 12 volt electric pump in one heater hose to improve circulation through the heater core. He also had a thermostat on the radiator side of the hot water heater outlet. When the fan and the pump were switched on (they shared a common switch) that heater would put out a lot of hot air. It was nice. I am assuming that this configuration was arrived at by trial and error, where he first tried to use only what the vendors offered and did not like the amount of heat that came out of it. Having the thermostat in the upper hose puts some back-pressure on water going out of the engine and to the heater. That helps. But I think my previous owner decided he needed more. I hope this helps. __________________ Jim Cannon Former MAFCA Technical Director "Have a Model A day!"