Automotive Air Conditioning Information Forum (Archives)

Provided by www.ACkits.com

We've updated our forums!
Click here to visit the new forum

Archive Home

Search Auto AC Forum Archives

Anyone remember GM VIR systems from the 70's?

76Chevelle on Wed April 09, 2014 11:52 AM User is offline

Year: 1976
Make: Chevy
Model: Chevelle
Engine Size: 305

Hey Folks- first off just want to say that this is a great forum for DIY'ers and i have met some great folks (electronically) on here and gotten some good information. FWIW i have purchased a compressor or two from AMA in the past. A rebuild is necessary again and I am calling to discuss flushing the evaporator and condenser on this original system. I have read hecat's flush post and will do it that way unless i hear different in this thread-hopefully i have the old tube and fin he discusses. Related to this there is a third 3-4mm tube coming out of the evaporator that goes into the VIR- hopefully that doesnt enter the flushing equation outside of flushing the top and bottom tubes. My other call is for the low service port on top of the VIR- does anyone know if that service port assembly (not the just the core) is removable or do you have to buy the whole VIR assembly? the reason i ask is that i somehow mucked that service port and now the schrader valve sticks out past the opening a mm or so and prevents me from connecting the gauge hose efficiently. Also i cannot remove the schrader valve with the tool so I would like to know if that service port housing (1/4 in cylinder about 3/4 in long) is removable from the VIR baseball cap? I guess if it is a replacement is probably scarce.

Yes the systems has that stinkin' A6 compressor but that subject has already been beat to death!

Thanks Guys

Dougflas on Wed April 09, 2014 1:23 PM User is offline

yes, the top comes off. That is where the POA and the TXV capsules are located.I may still have parts for that bad boy if you get in a bind.

slofut on Thu April 10, 2014 7:22 AM User is offline

They make a retrofit POA eliminator that replaces the POA exactly, with a switch that cycles the compressor instead like on most newer systems. I have an extra tube for r12 systems pretty cheap if needed.

Dougflas on Thu April 10, 2014 9:45 PM User is offline

Quote
Originally posted by: slofut
They make a retrofit POA eliminator that replaces the POA exactly, with a switch that cycles the compressor instead like on most newer systems. I have an extra tube for r12 systems pretty cheap if needed.


He is talking about a VIR. VIR's have a POA inside them. He can not eliminate just the POA. He would have to eliminate the complete VIR.

mk378 on Thu April 10, 2014 9:50 PM User is offline

Keeping the original configuration has better performance. Car makers switched to cycling systems in the late 1970'a (the golden era of really lousy domestic cars) because they are cheaper.

Back to Automotive Air Conditioning Forum

We've updated our forums!
Click here to visit the new forum

Archive Home

Copyright © 2016 Arizona Mobile Air Inc.