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Eelctrically Activated Heater Control Valve...ANyone..??

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4.4K views 10 replies 5 participants last post by  Viet Nam Vette  
#1 ·
I'm getteing ready to do and A/C update in my ride. It's a 65 Corvette with a 502. I spent alot of time engineering up the heater feed and return lines with AN fittings and Python Hose clamps.

This was done so that the heater hose assembly could be removed as one unit when servicing the Spark plugs or removing the battery. Just a simple drain down of the cooling system and a quick turn of an AN wrench and off come both lines which are tied together.

Now that I'm installing A/C.. I need to add a Heater Valve to turn the water on and off in conjunction with the A/C unit for defrosting and heating.

What I'm looking for is an electriclly controlled valve that I can mount up front at the water exit on the intake Manifold See the Picture Belowwithout having to cut the lines at the rear where it enters the heater core. In other words..leave the rear lines alone.

Anyone ever run acroos a small electric valve like that for what I'd like to do..??

Any Idea's...suggestions..

You'll see Water line exiting the manifold under the fuel inlet fitting. Now I know that I could just get some kind of a manual on/off valve and just turn it on at the beginning of winter and then off ain the summer.........

But...that wouldn't be Real Hot Rodding would it.... :D

Image
 
#3 ·
I'm sure there are some electrical valves out there, but they are relatively uncommon.

On my SBC chevy I have a vacuum operated bypass valve from some other vintage of GM product. When vacuum is applied it bypasses the heater core and routes the water directly back to the engine.

I currently have the bypass valve operated by the vacuum line to the upper vents, so it cuts off water to the heater core in both vent and A/C positions. However, I may change it to work only in max air recirculate mode. I've found that despite all the folk lore, cutting off heater core flow doesn't make that much difference in overall vent temps. With my A/C tuned right (correct charge, etc.), I can get down to about 35-40 degrees at the vent with or without the bypass.

Bruce
 
#4 ·
bondo said:
I've never seen an Electrically controlled Valve,..... Most are Vacuum controlled........
And,......
It Looks like it would make more sense to plumb it in, Right where you have the Unions at the rear of the Valve Cover.....
Click to expand...
Thanks Bondo.. Real estate back their is too tight and a Vacuum valve,..(Which I have) is quite large. I really nave more room up front.

:thumbup:
 
#5 ·
75gmck25 said:
I'm sure there are some electrical valves out there, but they are relatively uncommon.

On my SBC chevy I have a vacuum operated bypass valve from some other vintage of GM product. When vacuum is applied it bypasses the heater core and routes the water directly back to the engine.

I currently have the bypass valve operated by the vacuum line to the upper vents, so it cuts off water to the heater core in both vent and A/C positions. However, I may change it to work only in max air recirculate mode. I've found that despite all the folk lore, cutting off heater core flow doesn't make that much difference in overall vent temps. With my A/C tuned right (correct charge, etc.), I can get down to about 35-40 degrees at the vent with or without the bypass.

Bruce
Click to expand...
Thanks Bruce,
If this becomes a big PITA I'll just get one of them Russell "NPT to AN small lever shut off valves and do it manually. :thumbup:
 
#6 · (Edited)
Parker
makes a bunch of electrically-operated solenoid valves. Have a look at catalog page 33 (page 32 of the PDF file)

Reading through the majority of the catalog, it sounds like this "Type I" valve is approved for ethelyne glycol (page 38).

I'm not 100% sure of the availability of the "G23" coil in different voltages ... hopefully there is a 12V option?

Also from Parker "Gold Seal" series does specifically mention 12V on (catalog) pp. 28-30.

Here's a link to dealers in your area
HTH,
Don
 
#7 ·
66GMC said:
Parker
makes a bunch of electrically-operated solenoid valves. Have a look at catalog page 33 (page 32 of the PDF file)

Reading through the majority of the catalog, it sounds like this "Type I" valve is approved for ethelyne glycol (page 38).

I'm not 100% sure of the availability of the "G23" coil in different voltages ... hopefully there is a 12V option?

Also from Parker "Gold Seal" series does specifically mention 12V on (catalog) pp. 28-30.

Here's a link to dealers in your area
HTH,
Don
Click to expand...

Heh Don,
Thank You... Looks like something to go on. I'll take some time and review your research. The key here is to find something small and like you said ..gotta run on 12 volts.

Thanks for taking the time to research that for me. :thumbup:
 
#11 ·
solidaxel said:
Did you look on there web site!
Click to expand...
Thanks "SA"... Just went out and looked around ....I did locate a #46114-VUH "Servo Heater Valve" in there Replacement parts section. Doesn't give measurements or spec's so I'll call them tomorrow.

I had looked at there kit when I was shopping for a system. I didn't like the way the heater lines and A/C lines fead their underdash unit.

I went to Hot Rod Air's web page and there system for 63-67 Corvette uses the stock location for the heater lines. There unit has feed tubes for the heater in and out that pop right out in the stock locatin on the fire wall using your old heater box cover.

The A/C lines enter thru a plate which covers the old blower motor location. I think a much better engineered system.
http://www.hotrodair.com/index.html

Thanks again for your help. :thumbup:
 
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