Automotive Air Conditioning Information Forum (Archives)

JonM on Wed August 08, 2012 11:47 AM

Year: 1984
Make: Chevrolet
Model: Corvette
Engine Size: 350
Refrigerant Type: R12
Ambient Temp: 85
Country of Origin: United States

I replaced the clutch, expansion tube, evaporator, dryer, and high side hose...did a vacuum on the system and it held over night...filled it up using 3 cans of 14oz + 2ozs of R12 (system calls for 2.75 lbs)...air blowing out at max was 52 degrees... Car wasn't used all that much...when I did use it, after a few weeks, it wasn't getting cold, so I put the gauges back on and got the readings below and air bubbles in the site glass..any educated guesses as to what to look for?....Note...it does cycle and I did add oil as directed in mt Chevrolet manual.

Cold engine NOT running






Engaine running after 5 minutes

Gerald K4NHN on Wed August 08, 2012 2:27 PM

Make sure both valves on your gauges are closed when the motor is running..

JonM on Wed August 08, 2012 3:01 PM

Thanks..forgot about that...see what happens when you deal with amateurs...

JonM on Wed August 08, 2012 3:05 PM

The blower at the vent is blowing out at 69.5 degrees...ambient temp 85

Here is the reading with the gauges closed, ENGAGED (cycling) Compressor (engine running)...





and disengaged compressor (engine running)




Edited: Wed August 08, 2012 at 3:08 PM by JonM

Cussboy on Wed August 08, 2012 3:08 PM

I think you've leaked out some refrigerant.