heater water valve missing
Thread Starter
Drifting
Joined: Apr 2004
Posts: 1,437
Likes: 127
From: Mequon WI
heater water valve missing
I have no control of temp coming from the vents. I figure I probably have a lack of vacuum at the water vave. I found the off white yellow vacuum line and tried to trace it to the valve. The hose is looseand not conected to anything. But it does have vacuum.
I cannot find a water valve. It looks like someone took it out and patched the hose with a nipple and hose clamps. The picture is standing at the right fender looking dow n with the heater box to the left. Is this where a valve should be?
I cannot find a water valve. It looks like someone took it out and patched the hose with a nipple and hose clamps. The picture is standing at the right fender looking dow n with the heater box to the left. Is this where a valve should be?
Team Owner
Joined: Jun 2000
Posts: 38,923
Likes: 1,482
From: Southbound
Cruise-In II Veteran
What model year? Not all factory AC cars have the shut off valve. If your car had one, the assembly instruction manual (AIM) shows where and how it mounted and lists the original part number for the valve.
The valves could differ between model years.
The valves could differ between model years.
Burning Brakes
Joined: Oct 2001
Posts: 911
Likes: 5
From: TN
1970 Corvette
The water valve on my original owner 1970 is closed only when when the top selection for air conditioning is used which re-circulates air from only inside the car. The water valve is vacuum operated/powered and is controlled by the re-circulation of interior air selection when using the air conditioner.
Control the engine coolant heating up your heater core by disconnection of the heater hoses and use a U fitting to connect the two hoses. Coolant flowing through the heater core does help in engine running temperature some since it is a constant flow.
Control the engine coolant heating up your heater core by disconnection of the heater hoses and use a U fitting to connect the two hoses. Coolant flowing through the heater core does help in engine running temperature some since it is a constant flow.
Last edited by 70ZZ3 96LT4; Aug 14, 2014 at 02:56 PM.
Drifting
Joined: Apr 2014
Posts: 1,396
Likes: 129
From: Plainfield IN
What year is your car - my '78 has that color of vacuum line - valve is located where the nipple was put in. So you could have a vacuum issue since the off white vacuum line not corrected, also your AC is not working correctly since the hot water valve gets shut off when you turn the AC to "high". This is all based on if your car is close to being a '78 - since there are changes thru the years.
