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Old 03-30-2002, 01:10 PM
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Question hooking up a heater control using vacuum valve

I went junk yard diving today and found a vacuum controlled heater valve out of a Buick. My F100 has water flow all the time which gets pretty uncomfortable in the summer. I can connect or plug the vacuum to the unit to get water flow or not get flow but I'm trying to think of a better solution. Does anyone sell an aftermarket controller to adjust one of these like a factory install or does anyone have experience in retrofitting something that was factory? I have access to newer GM parts if I know what to use. It seems to me that all I have to do is vary the vacuum to the valve and there you have it. Thanks, HotRod

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Old 03-30-2002, 01:37 PM
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You might try using an early Dodge/Chryco manual valve and use a manual choke cable to adjust, might be easier?
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Old 03-30-2002, 01:51 PM
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Most EGR valves in newer Fords are supplied vacuum by a vacuum regulator solenoid. You might be able to use one of these to control vacuum to the heater control valve. Then you would just have to come up with how you want to control the valve (switch inside car to control power to solenoid). Just a thought, never actually done it before.
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Old 03-30-2002, 02:16 PM
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Im with 4JawChuck on this one, Go to your local napa store and look at their heater valve book section. I had a simular problem on my 69 427 corvette. The factory didn't put heater valves in the heater hose and hot coolant circulated through the heater core even in the hot summer months. They only re-directed the air flow with a ducting system that did not work very well and fried the passengers feet in the summer. I went to Napa and got a $8.00 valve. Now if it's cold out, I just pop the hood, turn the valve on and have heat.
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Old 03-31-2002, 04:40 PM
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egr solinoid idea sounds best to me with a toggle switch near heater control all the manufacturers use them just check the input voltage
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Old 03-31-2002, 05:18 PM
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Thanks for the ideas! Here is what I'm thinking, wire a 12V EP (electric-pneumatic) switch to the heater fan switch. Any time the fan is on, the EP opens and puts vacuum to the solenoid that in turn lets water into the coil. The fan has a high and a low so I guess I'll scrap the modulating the valve idea and just turn the fan up or down. Someone from another board told me that Vintage Air does something similar to this. I'm still open to any ideas, keep them coming! Thanks HotRod
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