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Thread: Replace A/C system, 134a upgrade information

  1. #11
    Join Date
    Jan 2004
    Location
    Houston TX
    Posts
    292

    Default

    thanks for info......

  2. #12
    Join Date
    Feb 2004
    Location
    Philippines
    Posts
    474

    Default

    Ok, I'm still running the original R12 system... but just in case my compressor dies... what do I have to change to go R134a?

    Are all I need the retrofit kit and a new R134a compressor? Everything else stays the same?

  3. #13
    Join Date
    Dec 2003
    Location
    baton rouge, loserana
    Posts
    6,922

    Default

    to do a retro on a running system, i drain the compressor of oil, replace the dryer and expansion valve, while the system is apart i blow as much oil from the system with shop air as i can, (now that i have a flush gun i flush the evap and condensor with ac flush solvent, $125 from napa for the gun/tank and a gallon of flush, i use a 1/2 pint at a time it's $50 a gallon) replace the fittings with quality steel fittings with their own valves not those shitty aluiminum ones that use the old valve, the good ones you remove the core from the old fitting before you screw on the 134 fitting on, refill the compressor with about 6 ounces of ester ac oil and vaccum the system down for about a half hour and charge with 3.4 pounds of r134
    all america wants is cold beer warm cat and a place to take a poop with a door on it

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