View single post by Brett Gibson JH5 20497
 Posted: 05-28-2008 10:21 am
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Brett Gibson JH5 20497


Joined: 03-17-2005
Location: Hilton, New York USA
Posts: 736
The lever operates a flap inside the heater box, and also engages a small vac control valve, which allows vacuum to the water flow valve, turning it on and off, by removing the water flow valve, you get constant flow no matter what position the control levers are set at. There are no on / off valves inside the car, the hose's pipe directly into the heater core itself, if there are no valves on the inlet or outlet hoses, you get flow.