Too hot! Install shut off valve on heater hose?

[Padre4art]

My 64 Newport gets very hot inside even in mild weather, with the heater on ‘air’ (vent) button setting, temp lever on cold.

Details:

White exterior.
Windows open.
Non air conditioned
Warm air comes through floor vent.
Engine is not running hot.

Will it hurt anything to install a summer shut off valve in a heater hose?

Thanks

Art

 

[Big_John]

Won't hurt a thing. I have one in my '70 300, done with the thought of making the AC run just a little colder. In theory anyway.... LOL!

 

[CBODY67]

Is there any heat/sound insulation on the inner cowl area? Perhaps you need some ThermoTec wrap on the exhaust pipes in the front area?

Ambient temps you notice this issue at?

CBODY67

 

[Padre4art]

This has been a problem even when the temperature is in the 70s. No insulation other than what the factory put under there.

Any vintage looking valves for car shows?

 

[Big_John]

This has been a problem even when the temperature is in the 70s. No insulation other than what the factory put under there.

Any vintage looking valves for car shows?

I use one that looks like this. Just google "heater hose shutoff valves".

 

[66/440]

Consider installing a 4 port heater control valve. They can be found on Chrysler and Mitsubishi products from late 80's and early 90's. Unlike the original valve which is just a stop these actually divert water back to the cooling system when the heater is not in use. Uses the original vacuum line for control.

 

[66/440]

Here is a diagram of the flow open and closed. This unit is electrical but it is the same principal for the vacuum controlled unit.

 

[Big_John]

Consider installing a 4 port heater control valve. They can be found on Chrysler and Mitsubishi products from late 80's and early 90's. Unlike the original valve which is just a stop these actually divert water back to the cooling system when the heater is not in use. Uses the original vacuum line for control.

View attachment 724379

I looked at some of those once when you posted it about 10 years ago, and from what I read, they worked backwards of the original valves. Vacuum stopped the flow rather than the vacuum allowing the flow like the OE does. Optional Heater Control Valve for Better AC cooling.

The links in that thread are dead, so I can't reread them.

Now, if that's not true, great!

 

[66/440]

I looked at some of those once when you posted it about 10 years ago, and from what I read, they worked backwards of the original valves. Vacuum stopped the flow rather than the vacuum allowing the flow like the OE does. Optional Heater Control Valve for Better AC cooling.

The links in that thread are dead, so I can't reread them.

Now, if that's not true, great!

4-Port Vacuum-Operated Fluidic Diverter Valve Automotive Heating System

4-Port Vacuum-Operated Fluidic Diverter Valve for Automotive Heating System. 2 left, 2 right ports.

infparts.com

 

[rd92west]

I use a hardware store PEX valve. 3/4 inch. They use them for plastic pipe home plumbing.
3/4 inch per is a perfect fit in 5/8 heater hose.
Paint the valve black and use a clamp like this also painted black. This clamp is off a Dakota aprox 1988, I'd expect it it common on all mopars
Put the valve upside down and near the firewall. Very few will notice it.
I don't have a picture of the valve but I get the more compact one. I'll see about a picture of the valve

 

[rd92west]

Shitoff

 

[Big_John]

http://[URL]https://infparts.com/product/ac1025-fluidic-diverter-valve/

[/URL]

That's good to see that it does work like the original as far as the vacuum. I could see this working OK on a 1969 and down car.

The obvious issue for my 1970 car is the two sizes of heater hose (1/2" and 5/8"). I don't see why the nipple on the water pump couldn't be changed to 5/8". Finding a good way to go from the 5/8" nipple on the control valve to the 1/2" might take a little thought, but it could be done.

Thinking about it, I looked at different, but similar valves but couldn't find the combo of 1/2" and 5/8" without the operation being reversed. But that was a while ago, so my memory could be fuzzy.