AC help! =) - The 1947 - Present Chevrolet & GMC Truck Message Board Network

OneMpg · 08-25-2003, 08:10 PM

I finally got some free time today to do all the behind-the-dash ducting for the heat/ac system. That was fun

Just a couple things left to do and there will be nothing on my truck that doesn't work. Anywho the passenger side kick panel vent is vacuum operated. (Not sure what the technical name for it is, but it lets in air from outside I believe.) If I am not mistaken it gets a vaccum line run from the AC/Heater control unit. If that is correct, then which one do I plug the vacuum line for the vent into? (Pic below) They are labled but incase the pic didnt come out. "1" is far right "2" is middle and "3" is far left. this control unit is an extra that I Just happen to have. The one in my truck has a cap over number 3. So where does the switch take the vaccum from? I'm going to assume that I have to run a line from the motor through the firewall and into the switch. Is that right? Also are there 3 outlets on the switch so that the driver kick panel vent can be vacuum operated too? That would be pretty sweet I might convert the driver's side too.

Thanks again for any help.

-Dave-

OneMpg · 08-25-2003, 08:11 PM

Close up shot

Class of 69 · 08-25-2003, 08:31 PM

vacuum source from engine to #1...vacuum to vent #2. The vacuum to the vent also controls the outside air door under the cowl, and the hot water shut off valve in the heater hose.

OneMpg · 08-25-2003, 09:04 PM

Thanks much. Also, is there somewhere where I can get the interior air distribution boxes? Basically just the two boxes that route the defrost/deice and the heat/ac. The boxes that I have are a bit worse for wear. I will try painting them but if I can buy them new I'd do that in a sec. Thanks-

-dave-

70shortnphat · 08-25-2003, 11:34 PM

Hope this isnt too small.

*racedvl* · 08-26-2003, 08:23 AM

Bigger . . . .

OneMpg · 08-26-2003, 01:25 PM

Thanks

Just what I needed.

-Dave-

ddsmith · 08-26-2003, 05:30 PM

OneMpg,
What kind of shape are you looking for from the boxes. I ripped the A/C out of my truck and put in a Old Air unit. I was getting ready to pitch this stuff in the dump. Let me know if I can help.

08-25-2003, 08:31 PM	#3
Class of 69 Registered User Join Date: Mar 2003 Location: Stillwater MN Posts: 1,166	vacuum source from engine to #1...vacuum to vent #2. The vacuum to the vent also controls the outside air door under the cowl, and the hot water shut off valve in the heater hose. __________________ 69 GMC K10 ..some restoration required....still..

08-25-2003, 11:34 PM	#5
70shortnphat "See the U.S.A....." Join Date: Apr 2002 Location: Richmond TX. Posts: 269	Hope this isnt too small. Attached Images __________________ 1970 short bed fleetside 1949 all origional chevy 3600 1974 camaro Richmond , Texas(just S.W.of Houston)

08-26-2003, 08:23 AM	#6
racedvl Account Suspended Join Date: Jan 2000 Location: Woodstock, IL Posts: 7,020	Bigger . . . . Attached Images

08-26-2003, 05:30 PM	#8
ddsmith Glowing since 1978 Join Date: Mar 2001 Location: Lusby,MD,USA Posts: 532	OneMpg, What kind of shape are you looking for from the boxes. I ripped the A/C out of my truck and put in a Old Air unit. I was getting ready to pitch this stuff in the dump. Let me know if I can help. __________________ 66 Chevy C30 Stakebody Dump, PS,PB, 327cu in 71 Corvette Coupe 454 4 speed 69 Chevy C20 Custom Camper

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08-25-2003, 08:10 PM	#1
OneMpg Registered User Join Date: Jul 2003 Location: Pleasant Hill, Cali Posts: 43	AC help! =) I finally got some free time today to do all the behind-the-dash ducting for the heat/ac system. That was fun Just a couple things left to do and there will be nothing on my truck that doesn't work. Anywho the passenger side kick panel vent is vacuum operated. (Not sure what the technical name for it is, but it lets in air from outside I believe.) If I am not mistaken it gets a vaccum line run from the AC/Heater control unit. If that is correct, then which one do I plug the vacuum line for the vent into? (Pic below) They are labled but incase the pic didnt come out. "1" is far right "2" is middle and "3" is far left. this control unit is an extra that I Just happen to have. The one in my truck has a cap over number 3. So where does the switch take the vaccum from? I'm going to assume that I have to run a line from the motor through the firewall and into the switch. Is that right? Also are there 3 outlets on the switch so that the driver kick panel vent can be vacuum operated too? That would be pretty sweet I might convert the driver's side too. Thanks again for any help. -Dave- Attached Images

08-25-2003, 08:11 PM	#2
OneMpg Registered User Join Date: Jul 2003 Location: Pleasant Hill, Cali Posts: 43	Close up shot Attached Images

08-25-2003, 09:04 PM	#4
OneMpg Registered User Join Date: Jul 2003 Location: Pleasant Hill, Cali Posts: 43	Thanks much. Also, is there somewhere where I can get the interior air distribution boxes? Basically just the two boxes that route the defrost/deice and the heat/ac. The boxes that I have are a bit worse for wear. I will try painting them but if I can buy them new I'd do that in a sec. Thanks- -dave-

08-26-2003, 01:25 PM	#7
OneMpg Registered User Join Date: Jul 2003 Location: Pleasant Hill, Cali Posts: 43	Thanks Just what I needed. -Dave-



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