Heater control valve
Lead Driver
Joined: Jun 2003
Posts: 8,298
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From: Damon (South East Texas)
I was looking at this last week. Looks like the vacuum line would need to be run thru the firewall to the line at the recirculating air vent diaphragm under the dash below thw glove box. I believe this vacuum line, on the OBS, is under the hood in the far left corner of the engine compartment (when facing the engine). I opted to go with the manual valve to eliminate the excess heat when using the vents after the engine has "heat soaked" after being driven and parked for awhile.
Posting Guru
Joined: Dec 2004
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Originally Posted by 3 of 7
I used a manual valve as well. I'm going to install a cable like the old trucks had so I can control it myself (rather than having to turn the air on to be cool)
I, too, am setting up a manual cable operation to the valve. I just haven't decided where to put it...
Fleet Mechanic
Joined: Aug 2003
Posts: 1,771
Likes: 95
From: Phoenix, AZ
I have one from the Dieselsite and it is activated by selecting the Max AC and the valve diverts the coolant from the heater core.
Because I live in the SW I've thought about just putting in a mechanical ball valve under the hood and just keeping it closed. I don't need the coolant going through the heater core ever, except a few months a year.
Because I live in the SW I've thought about just putting in a mechanical ball valve under the hood and just keeping it closed. I don't need the coolant going through the heater core ever, except a few months a year.
Senior User
Joined: Sep 2003
Posts: 285
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From: Not this forum
Originally Posted by arninetyes
Agreed. The ONLY time I want hot water in the heater core is when I'm turning on the heat or the defroster.
I, too, am setting up a manual cable operation to the valve. I just haven't decided where to put it...
I, too, am setting up a manual cable operation to the valve. I just haven't decided where to put it...
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Laughing Gas
Joined: Feb 2004
Posts: 831
Likes: 16
From: sacramento
Well I guess I will just keep it manual if the T into the vac line only closes the valve on max ac 
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Tuned
Joined: Jun 1999
Posts: 495
Likes: 2
From: Spearfish SD
Lots of us have done this conversion to our trucks. I picked up a electrically operated vacuum switch and a vacuum operated heater valve and added it to my truck. I didn't want to have to be opening the hood all of the time to turn a valve off or on. When I want heat, a quick flip of the switch and its there. It made the AC temp about 5 degrees cooler, and you can have cool outside air coming through the vents instead of 85 degree air on a 70 degree day.
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Tuned
Joined: Jun 1999
Posts: 495
Likes: 2
From: Spearfish SD
Yup, it was Vintage Air Look on page 34 of the online catalog. Since you live reasonable close to me, you are welcome to take a look at how I have mine hooked up. I'm usually home Saturday, Sunday and Monday.
Elder User
Joined: Sep 2004
Posts: 780
Likes: 1
From: Chicago suburbs
Neil,
Do you have any pictures of your installation? And how about the part numbers? I can do pretty well installing things with a list of parts and maybe some instructions, but trying to figure out what parts someone would use out of a catalog full of possible parts, nope, not enough money for all the parts that I could incorrectly buy. thanks
Do you have any pictures of your installation? And how about the part numbers? I can do pretty well installing things with a list of parts and maybe some instructions, but trying to figure out what parts someone would use out of a catalog full of possible parts, nope, not enough money for all the parts that I could incorrectly buy. thanks
Tuned
Joined: Jun 1999
Posts: 495
Likes: 2
From: Spearfish SD
The part number for the Vintage Air Vacuum switch is 11542-VUS. I don't have the part number at the moment for the heater valve, but they are available at AutoZone and Kragen, NAPA etc. I purchased the one that allows the coolant to flow when the vacuum is applied (switch in the cab turned on). It is just a simple in-out valve. I'll try to find the part number for the valve when I get off work tomorrow.
Those two items, some 14 ga. wire, a few wire connectors, a couple of feet of vacuum line, a vacuum "T" and a couple of hose clamps and you are done.
I do have a few pictures that I got from another fella when I did my install. I can send them to you if you'd like.
Those two items, some 14 ga. wire, a few wire connectors, a couple of feet of vacuum line, a vacuum "T" and a couple of hose clamps and you are done.
I do have a few pictures that I got from another fella when I did my install. I can send them to you if you'd like.
Tuned
Joined: Jun 1999
Posts: 495
Likes: 2
From: Spearfish SD
Originally Posted by kawika
Neil,
That would be great. Summertime is coming up fast and It would be nice to have colder AC in the Cab.
That would be great. Summertime is coming up fast and It would be nice to have colder AC in the Cab.
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