I'm TOO hot!!

gomersdad · #1 (**permalink**) 03-31-2002, 05:14 PM

I am installing a universal heater box, the only way to shut off the heat will be to stop the flow of coolant - here's my problem - can I just install shut off valves, or does the system have to be able to continue the loop? Any help on this would be appreciated.
Ken

Cobranut · #2 (**permalink**) 03-31-2002, 05:19 PM

Ken,

It is preferable to shut off the flow through the heater core in hot weather, as this forces more coolant to flow through the radiator, increasing cooling capacity. There is no problem with excess pressure.

Later,

petek · #3 (**permalink**) 03-31-2002, 05:22 PM

Just shut off the flow, that's what the vacuum valve does on my Cobra. Here's a link to a fellow restoring an old Ferrari, the Ferrari uses a valve in the engine compartment for shutting off the heater: http://www.tomyang.com/cars/ferrari.html

gomersdad · #4 (**permalink**) 03-31-2002, 05:25 PM

Hi guys;
Should I put the shut offs as close as possible to the water pump, or can I put them near the core? Will the trapped coolant in the lines get excessively hot?
Ken

P.S. - petek - where on the Ferrari site is the info about the shut off valve - are there pictures? Thanks.

Bill E · #5 (**permalink**) 03-31-2002, 06:25 PM

You can put the valve in either line where it looks best to you. Just be sheer to blow through it in the off position. if it is working properly it will not pass air Bill E

Okiesnake · #6 (**permalink**) 03-31-2002, 07:55 PM

I used a manual choke cable assembly to activate the heater valve. The valve can be purchased From vintage Air. For a pic see http://pages.sbcglobal.net/tdockstett/HeatVc.jpg
Okiesnake

gomersdad · #7 (**permalink**) 04-01-2002, 05:26 PM

OThank you for the info, should i install the shutoff in just one line or both to completely stop hot coolant
Ken
P.S Okiesnake do you have a price on that valve could not find it on vintage site

DAVID GAGNARD · #8 (**permalink**) 04-01-2002, 06:30 PM

Ken;

I have seen these valves on many autos,but mostly GMs and mostly Caddys and Buicks,do not know why. They are mostly vacum operated but I have seen a few on older trucks that had the manuel choke type cable to operate.. All those I have seen were located on one hose only and very close to the firewall or heater box...I think they where put there for ease and convience rather than anything else....

You would need to check the flow direction of your heater hoses and I would think put the valve in the hose going into the heater box,not the hose coming out,that way you stop the flow before it gets to the box..

Hope this helps.....

David

gomersdad · #9 (**permalink**) 04-01-2002, 06:46 PM

David ...makes complete sense now that you said it.
thanks Ken

Okiesnake · #10 (**permalink**) 04-03-2002, 10:11 AM

It really doesn’t matter where you mount the valve (going to or from the heater box). You only need one valve. Vintage Air offers 2 cable heater control valves. 46104-VUH (pull to close) for $18.50 and 46105-VUH (pull to open) for $18.00.
Vintage Air has a picture of the part as well as a price sheet catalog on their web site. Their phone number is 1-800-862-6658
There is an arrow on the valve as to the direction of water flow the valve is mounted. If mounted incorrectly it may not shut off completely, wear out prematurely or creep partially open. You don't have to mount a cable to remotely activate the valve. You could open the hood and manually turn it by hand. The old MG's had a "winter/summer" mode under the hood.

gomersdad · #11 (**permalink**) 04-03-2002, 06:06 PM

Okiesnake

thank you for the help, I will order a valve today and will go with the cable to open/close the valve, just mount the knob under the dash.
Ken

Jack21 · #12 (**permalink**) 04-03-2002, 07:25 PM

Also used Vintage Air manual, cable operated valve. Valve goes in the hot water out to heater core in line, the one coming out of the intake manifold. The line going to the water pump is the return line. A manual valve can be partially opened to regulate temperature, wheras a vacuum valve is open or closed.

Double Venom · #13 (**permalink**) 04-03-2002, 07:49 PM

May I ?

Vantage is awesome, great and has wonderfull support..use their stuff weekly..But, if you want cheap, immediate and bullitt proof, simply go to NAPA and ask for a universal shut off valve.

Almost every NAPA store I've been to has them hanging on the blister pack racks -- usually with the cable included, or at least right next to them!

DV
300 Cobras is NOT enough!

Okiesnake · #14 (**permalink**) 04-03-2002, 07:50 PM

BTW, the valve is at http://www.vintageair.com/controls/page32.htm
the price catalog is at http://www.vintageair.com/download/VintageAir.pdf