AC coolant bypass valve or cutoff valve - Diesel Forum - TheDieselStop.com
1999-2007 General Questions General questions related to 1999-2007 Super Duty trucks. If it doesn't fit the other categories, post it here. Gas engine discussion that pertains to all models is allowed. Specific gas engine questions should use the Gas Engines forum.

 
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post #1 of 6 (permalink) Old 04-19-2017, 04:55 PM Thread Starter
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AC coolant bypass valve or cutoff valve

hey all, I noticed that the heater control valve has a barb with no hose hooked to it . I do not see a hose around anywhere and am not sure where the control side is or where it supposed to attache to. All data doesn't show me anything and doing searches shows different valves. Im wondering since my truck is a half year it could be the reason for a different looking part . Could explain why max ac inst much better the regular ac haha.

my truck a 2003 7.3 4x4.

thanks in advance for any help

looking at it last night, the vacuum lines run off the vacuum hub switch and one line run towards the back over the fan housing which I believe is for the recirc door. should there be a T in there on line to run t the valve ?
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Last edited by Robert Stoner; 04-20-2017 at 11:01 AM.
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post #2 of 6 (permalink) Old 04-25-2017, 06:54 PM Thread Starter
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nothing? its a tough one
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post #3 of 6 (permalink) Old 04-25-2017, 07:54 PM
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I'll take some pictures of mine in the morning when it's light out. Mine is an 03 as well.


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2003 F-250 XLT Crew Cab 7.3L, Chrome BigTex Grille Guard, Quad pillar - 3 ISSPRO gauges (trans, pyro, boost) and DP-Tuner F6; Roush fuel pressure / temperature / oil pressure gauges, Ford Severe Duty AIS, 31 row 6.0 transmission cooler, ScanGauge II, Marinco mod, Walker BTM

I wonder if clouds ever look down on us and say, "Hey, look - that one is shaped like an idiot!"
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post #4 of 6 (permalink) Old 04-26-2017, 01:46 PM Thread Starter
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I'll take some pictures of mine in the morning when it's light out. Mine is an 03 as well.


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AWESOME! thank you
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post #5 of 6 (permalink) Old 04-26-2017, 05:44 PM
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The grey tube from the valve goes straight to the passenger fender liner and down the side of the fan into the cab. The last picture is behind the glove box. I haven't pulled lines to see which is which inside.

AC coolant bypass valve or cutoff valve-imageuploadedbyag-free1493246652.916295.jpgAC coolant bypass valve or cutoff valve-imageuploadedbyag-free1493246670.415817.jpgAC coolant bypass valve or cutoff valve-imageuploadedbyag-free1493246684.113964.jpgAC coolant bypass valve or cutoff valve-imageuploadedbyag-free1493246695.647458.jpg


Edit - looking at your second picture, the grey tube is there. You just need to find out where the end is and plug it in.

2003 F-250 XLT Crew Cab 7.3L, Chrome BigTex Grille Guard, Quad pillar - 3 ISSPRO gauges (trans, pyro, boost) and DP-Tuner F6; Roush fuel pressure / temperature / oil pressure gauges, Ford Severe Duty AIS, 31 row 6.0 transmission cooler, ScanGauge II, Marinco mod, Walker BTM

I wonder if clouds ever look down on us and say, "Hey, look - that one is shaped like an idiot!"

Last edited by RT; 04-27-2017 at 09:28 AM.
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post #6 of 6 (permalink) Old 04-27-2017, 10:35 AM Thread Starter
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The grey tube from the valve goes straight to the passenger fender liner and down the side of the fan into the cab. The last picture is behind the glove box. I haven't pulled lines to see which is which inside.

Attachment 108545Attachment 108553Attachment 108561Attachment 108569


Edit - looking at your second picture, the grey tube is there. You just need to find out where the end is and plug it in.
AWESOME thank you so much! Now, on to the next part where to get the hose haha. going to fun to explain to the parts guy

Last edited by Robert Stoner; 04-27-2017 at 11:09 AM.
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