1979 Chevrolet C70 Conversion to OEM Air Conditioning - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Airdirect · 07-29-2018, 11:30 AM

Thanks Robert, I will jack it up and check the run out. Hopefully that will fix the problem. I hope it is not a bad tire. I still need to get the A/C fan clutch installed. I am sure it will reduce load on the engine and noise. The current fan is fixed and very noisy. With a Detroit Diesel cooling is not much of a problem. I cannot imagine why GM did not make the clutch standard on this model. Thanks for all your input!

Airdirect · 08-09-2018, 11:27 PM

I am having trouble with my new Accuride de-mountable rims. The part of the rim that clamps to the wheel runs true. However the outer rim wobbles. It appears that when the welded the clamp ring to the wheel they did not have it square. Anyone else had problems with Accuride rims?

DT3Ton · 08-29-2018, 01:19 PM

Thanks for documenting this so well.

Were the AC donor parts from a pickup or MDT? I would like to add air to my crew cab.

gmtech68 · 08-30-2018, 01:16 PM

Find an experienced tire guy. It is part art, part skill to tighten clamp nuts so the wheel runs true.

Airdirect · 08-31-2018, 05:47 PM

The parts were from both a C65 and 70's pickup. The evaporator and heater core are all the same. The parts that are unique to the 2 ton are the vent distribution in the dash and the mode selector control (no bi-level mode on the truck). I believe that a pickup unit would work, you would just have to use hose instead of the molded plastic parts to distribute the air to the drivers side of the dash. I am not totally sure as I was able to rob those parts from the C65. I know the heater floor distribution is different. I reinstalled my original heater floor distribution unit and it mated up with the pickup evaporator housing. The pickup condenser is very similar and can be made to work. The lines on it are aluminum where the C65 used steel. Hope this helps.

David

Airdirect · 08-31-2018, 05:50 PM

Quote:

Originally Posted by gmtech68

Find an experienced tire guy. It is part art, part skill to tighten clamp nuts so the wheel runs true.

Thanks!

Airdirect · 08-31-2018, 06:05 PM

More progress. I am purchasing a Jerr-Dan rollback bed off a wrecked GMC/Chevy Medium Duty truck. The bed has been removed and is being prepped for installation. The bed was purchased from Jon Wickham and Associates, a Danco Products dealer in the Dallas area (jonwickham.com).

Airdirect · 09-01-2018, 12:18 AM

Picture taken by Jon Wickham & Associates of the truck awaiting bed installation.

https://www.facebook.com/jonwickhama...ciates/photos/

07-29-2018, 11:30 AM	#1
Airdirect Registered User Join Date: Oct 2016 Location: Powderly Texas Posts: 301	1979 Chevrolet C70 Conversion to OEM Air Conditioning Thanks Robert, I will jack it up and check the run out. Hopefully that will fix the problem. I hope it is not a bad tire. I still need to get the A/C fan clutch installed. I am sure it will reduce load on the engine and noise. The current fan is fixed and very noisy. With a Detroit Diesel cooling is not much of a problem. I cannot imagine why GM did not make the clutch standard on this model. Thanks for all your input!

08-09-2018, 11:27 PM	#2
Airdirect Registered User Join Date: Oct 2016 Location: Powderly Texas Posts: 301	1979 Chevrolet C70 Conversion to OEM Air Conditioning I am having trouble with my new Accuride de-mountable rims. The part of the rim that clamps to the wheel runs true. However the outer rim wobbles. It appears that when the welded the clamp ring to the wheel they did not have it square. Anyone else had problems with Accuride rims?

08-29-2018, 01:19 PM	#3
DT3Ton Registered User Join Date: Sep 2015 Location: Saskatoon, SK, Canada Posts: 7	Re: 1979 Chevrolet C70 Conversion to OEM Air Conditioning Thanks for documenting this so well. Were the AC donor parts from a pickup or MDT? I would like to add air to my crew cab.

08-30-2018, 01:16 PM	#4
gmtech68 Registered User Join Date: Aug 2008 Location: Devon, Alberta Posts: 24	Re: 1979 Chevrolet C70 Conversion to OEM Air Conditioning Find an experienced tire guy. It is part art, part skill to tighten clamp nuts so the wheel runs true.

08-31-2018, 05:47 PM	#5
Airdirect Registered User Join Date: Oct 2016 Location: Powderly Texas Posts: 301	1979 Chevrolet C70 Conversion to OEM Air Conditioning The parts were from both a C65 and 70's pickup. The evaporator and heater core are all the same. The parts that are unique to the 2 ton are the vent distribution in the dash and the mode selector control (no bi-level mode on the truck). I believe that a pickup unit would work, you would just have to use hose instead of the molded plastic parts to distribute the air to the drivers side of the dash. I am not totally sure as I was able to rob those parts from the C65. I know the heater floor distribution is different. I reinstalled my original heater floor distribution unit and it mated up with the pickup evaporator housing. The pickup condenser is very similar and can be made to work. The lines on it are aluminum where the C65 used steel. Hope this helps. David

08-31-2018, 06:05 PM	#7
Airdirect Registered User Join Date: Oct 2016 Location: Powderly Texas Posts: 301	1979 Chevrolet C70 Conversion to OEM Air Conditioning More progress. I am purchasing a Jerr-Dan rollback bed off a wrecked GMC/Chevy Medium Duty truck. The bed has been removed and is being prepped for installation. The bed was purchased from Jon Wickham and Associates, a Danco Products dealer in the Dallas area (jonwickham.com). Attached Images

09-01-2018, 12:18 AM	#8
Airdirect Registered User Join Date: Oct 2016 Location: Powderly Texas Posts: 301	1979 Chevrolet C70 Conversion to OEM Air Conditioning Picture taken by Jon Wickham & Associates of the truck awaiting bed installation. https://www.facebook.com/jonwickhama...ciates/photos/ Attached Images



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