134a A/C pressure specs? | FerrariChat
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134a A/C pressure specs?

Discussion in 'Technical Q&A' started by chairpilot, May 1, 2011.

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  1. chairpilot

    chairpilot Formula 3

    Mar 3, 2007
    1,547
    LA, CA & Olympia, WA
    Full Name:
    PlateClipGuys
    #1 chairpilot, May 1, 2011
    My 308 QV was converted to 134a by the PO. I know because it has the newer fittings and I have done a simple single hose recharge in the past with noticeable positive cooling results. But I know I have a leak somewhere and I've been reading & learning more about servicing this system. So I recently purchased a professional (MAC Tools) gauge/hose setup to charge and monitor the system. But, I do not know what high/low pressure readings should be to determine if the system is full. I cannot find specs on the original R12 pressures. Would the 134a be the same pressures as R12 was?

    Thanks for any assist.
     
  2. PAP 348

    PAP 348 Ten Time F1 World Champ
    Lifetime Rossa Owner

    Dec 10, 2005
    100,232
    Mount Isa, Australia
    Full Name:
    Pap
    #2 PAP 348, May 1, 2011
    Low pressure side should be between 20-30 psi.

    High pressure side should be between 200-250 psi.

    Somewhere around those numbers mate. :):)
     
  3. Paul_308

    Paul_308 Formula 3

    Mar 12, 2004
    2,345
    #3 Paul_308, May 1, 2011
    While you are in the learning mode...head to YouTube and 'Automotive Air Conditioning' for a plethora of videos. One had a good clue for leak finding...the refrigerant oil often coats the hose in the area of the leak...a good inspection trick. GL
     
  4. chairpilot

    chairpilot Formula 3

    Mar 3, 2007
    1,547
    LA, CA & Olympia, WA
    Full Name:
    PlateClipGuys
    #4 chairpilot, May 2, 2011
    thanks guys. I'm on a mission!
     

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