Quote:
Originally Posted by Formula413
I always wondered about that. I have been at car shows and seen old cars with a little spigot under the hood that would allow you to shut off coolant to the heater core. It does seem stupid to have it hot year round. I wonder if there is anything to gain by adding something like that to a car, it wouldn't be that hard.
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You could put one of these:
"ACE" QUARTER TURN 3-WAY VALVE Dual outlet AH2905 PLUMB PAK CORPORATION in the hoses to/from the heater core and manually be able to bypass the flow to the heater.
I wouldn't want to use a 2-way valve to stop the flow through the circuit entirely, it might interrupt cooling flow though part of the engine. But a bypass would positively keep the core cool and prevent the pass. compartment from getting as hot in warm weather.