Where is this valve?
07-20-2003, 11:11 PM
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Where is this valve (vacuum switch)?
The 77 GM service manual shows this vacuum diagram for the vette, and in the middle of the diagram there is a water shut-off switch. Where on the car is this switch located? TIA, Mike
[Modified by mfendley, 10:18 PM 7/20/2003]
[Modified by mfendley, 10:18 PM 7/20/2003]
07-20-2003, 11:13 PM
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St. Jude Donor '06-'10, '13
Re: Where is this valve? (mfendley)
On my 1980 it is mounted on the passenger side inner fender well.
Just follow your heater hoses from the engine to the firewall. It should be in-line. If it's not, somebody removed it.
Just follow your heater hoses from the engine to the firewall. It should be in-line. If it's not, somebody removed it.
07-20-2003, 11:17 PM
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Re: Where is this valve? (BSeery)
I should have been more clear. You are right about the valve (which is what I typed in the subject line). What I really want to know is the shut-off switch that sends the vacuum signal to the valve (as seen in the middle of the vacuum diagram)
Mike
Mike
07-20-2003, 11:27 PM
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Re: Where is this valve? (LAvetteman)
The hot-cold lever goes to a cable that in the cold position, moves a temperature door that directs incoming air around the heater core. In the hot position, the cable pulls the door forcing the air through the heater core. According to the diagram, there is also some kind of vacuum switch that sends a vacuum signal to the heater control valve causing it to shut (it is in the open position when there is no vacuum).
07-21-2003, 05:57 AM
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Re: Where is this valve? (mfendley)
It's on top of the ventwork on the passenger side of the car behind the dash pad. I've got pictures at my web site. http://home.comcast.net/~chadwick.ro...entilation.htm
