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Topic: hot water shut off valve

in Forum: C3 Cooling and Heating Systems


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hot water shut off valve

Posted: 11/2/07 3:59am Message 1 of 4
mikeee
Former Member
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Oviedo, FL - USA
Joined: 9/8/2006
Posts: 267
Vette(s): 1977 t-top
Is this valve required? Looks to me like some form of a shut off/turn in valve.What happens if it is removed? What/where is the very small white plastic line coming from it? What does that do? Where is it going? If it is a required pc. do I need a newer one?


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hot water shut off valve

Posted: 11/2/07 4:10am Message 2 of 4
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dwright
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Victor, NY - USA
Joined: 7/12/2004
Posts: 6841
Vette(s): 2004 Commemorative Edition Coupe, Auto w/HUD. 13K miles in 2015. Sold 1982 Red Coupe
Sounds like a PO installed the valve to reduce heat in the summer.
If you remove it, you will probably notice heat coming out the vents, even though the air vent is off.
Need a picture of the small white line to help you with that.



 
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hot water shut off valve

Posted: 11/2/07 4:15am Message 3 of 4
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Redwingvette
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Waterford, MI - USA
Joined: 9/13/2002
Posts: 1754
Vette(s): 1973 Red coupe
Sounds to me like you have a vacuum operated heater shut off valve. This white line is a vacuum line and goes into the control panel that operates the heater. Most earlier Vettes did not have them. What it does is stop hot water from circulating through the heater core when the heat is not on. This reduces the amount of heat in the cabin while you are driving making it easier for the AC to work.
 
My 73 did not have a valve so I put a manually operated one in myself for the same reason. I have to open the hood to turn it on/off but I only use it in the spring and fall.
Redwingvette2007-11-02 04:16:47


Brian - NCM Lifetime Member

73 coupe L48, Flat-top pistons, Performer RPM Heads, Crane Cam and roller rockers, Holley 650 vac sec. Performer intake,
3.55 gear BTO 200-4R trans,
Leather seats, Seatbelt Plus 3point seatbelts, Pioneer CD player
Magnaflow Exhuast System

Dewitt radiator and dual electric fans
Borgeson Steering box
 


hot water shut off valve

Posted: 11/2/07 4:59am Message 4 of 4
art-corvette
Former Member
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Joined: 8/16/2005
Posts: 242
i wouldn't like to drive around without the shutoff valve... getting way to hot inside the car .. unless you live in alaska maybe :)
as mentioned.. the small line is the vacuum line to operate the valve to  open/close .

art-corvette



in Forum: C3 Cooling and Heating Systems


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