Heater hose inline valve question..
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Senior User
Joined: Sep 2004
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From: Livermore,CA.
Heater hose inline valve question..
I was thinking about the discussions regarding putting a valve in the heater hose to cut off coolent in A/C mode and someone mentioned that some trucks had a valve already installed... So I went out to my truck and found a vacuum operated valve...2" or so round in line on my heater hose by the firewall...Is this the valve people were talking about? if so what does it do??
Chris..
Chris..
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Senior User
Joined: Sep 2004
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From: Livermore,CA.
Originally Posted by miller_feed
The valve reroutes the flow so as not to go into the heater core. This helps with cooling the inside of the cab.
Not a liberal...
Joined: Jul 2006
Posts: 6,635
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From: Cut & Shoot, Texas
I used the white vacuum line and it only closes in MAX A/C mode. I have the valve installed from DieselSite. Takes about 20 minutes to install and it makes the A/C a lot colder than stock.
Last edited by Texas Outlaw; Jan 7, 2008 at 05:10 PM.
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Senior User
Joined: Sep 2004
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From: Livermore,CA.
Why does mine have the valve and some not??
Texas Outlaw....Mine came stock....does mine also only work in Max AC?
Chris.
Texas Outlaw....Mine came stock....does mine also only work in Max AC?
Chris.
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Not a liberal...
Joined: Jul 2006
Posts: 6,635
Likes: 4
From: Cut & Shoot, Texas
This is what you do to find out. Pop the hood and have someone switch from MAX A/C to A/C and while you watch the valve. You should see it open and close. That's how my son and I figured out that ours was working the way that it is supposed to. That's also one of the things we did when we were troubleshooting the vacuum leak to my hubs. Our valve stopped working when we had our vacuum leak. Once we fixed it it worked again.
Post Fiend
Joined: Sep 2006
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From: Millbrook Alabama
Originally Posted by F3504ME
Scott...Nothing is visable on my valve...It appears to be contained in the valve itself..
Chris..
Chris..
An even simpiler way is to disconnect vac line from valve and have a helper cycle the A/C switch with the engine running , and find out when you feel vac pressure applied to your finger.
