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Introduction, and questions about a system I'm putting together

Chevyrestoguy on Wed April 10, 2013 5:15 PM User is offline

Year: 1964
Make: Chevrolet
Model: C-10
Engine Size: 350
Refrigerant Type: R134
Country of Origin: United States

I am new to this forum, so I would like to introduce myself. My name is Alex, and I'm an aerospace worker living in Southern California. I build and restore vintage cars, trucks, and motorcycles as a hobby. I was recommended to this site by a fellow member on a site I frequent ( He just finished his A/C installation in his '65 C-10, and found this site extremely helpful.

I am building a '64 Chevrolet C-10 truck. It was originally equipped with factory air, but most of the parts were missing when I got the truck. I have collected almost all of the factory parts to complete the install, but because the original system was an R12-based system, I need to ask some questions concerning what I need to do to make it a good-working R134 system. I am not going to be running the old A6 compressor. My engine has been retrofitted to the later model serpentine system, so my compressor is now an R4, which is brand new. I am also going to be using a late model condensor out of a 2008 Z06 Corvette.

1): Are the replacement expansion valves calibrated for R134, or are they the same between a R12 and R134 application?

2): My evaporator has the old worm-clamp hose fittings, and because I'm going to be using barrier hose, they won't work. I want to tig-weld some fittings on the end to accept the newer hoses. Any recommendations on where to get weld-on fittings?

3): I am going to need to make custom hoses for this application. My compressor manifold is off of an 1988 Chevy truck, and it does not have the high-side fitting on it. This means that I will have to put both the high and low side fittings somewhere in the hose runs. It is specific where I place the fittings in the system? I usually see the high side fitting between the compressor and the condensor on stock GM vehicles.

That's all I can think of for now. Any help would be greatly appreciated!

TRB on Wed April 10, 2013 9:01 PM User is offlineView users profile

TXV valves use a probe to open and close. So not a whole lot of difference between a R12 or R1314a valve.

I think the website that supports this forum has weld on fittings. Have to double check with the owner to be sure.

In-line service ports can also be found at


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