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VetteMed · 06-12-2011

I just got to thinking -- the heater bypass valves that are available, are 1-in, 2-out, where one of the outputs goes to the heater core, under heat demand, and when AC is needed, the other output is supposed to return coolant to the water pump or other suitable area in the cooling system return side. Trying to figure out where I'd route the bypassed coolant back to if I were to plumb in such a valve.

EDIT: Looks like 4-port valves exist, to form an "H" in the system, I think that would be the way to go here if needed..

06-12-2011	#4
VetteMed Join Date: Mar 2009 Location: Orlando, FL Posts: 1,816	Re: Heater core shutoff valve? I just got to thinking -- the heater bypass valves that are available, are 1-in, 2-out, where one of the outputs goes to the heater core, under heat demand, and when AC is needed, the other output is supposed to return coolant to the water pump or other suitable area in the cooling system return side. Trying to figure out where I'd route the bypassed coolant back to if I were to plumb in such a valve. EDIT: Looks like 4-port valves exist, to form an "H" in the system, I think that would be the way to go here if needed.. Last edited by VetteMed; 06-12-2011 at 10:41 AM.