472 a/c conversion

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  • 2 Post By 72coupethang
500, 472, 425, 368 Discussion, 472 a/c conversion in Cadillac Engine Discussion; i got a 1972 7.7 472 and im wondering did anybody ever put a smaller a/c compression on it off ...
  1. #1
    72coupethang is offline Cadillac Owners Member
    Automobile(s): 1972 cadillac coupe 472
    Join Date
    Feb 2012
    hampton, va

    472 a/c conversion

    i got a 1972 7.7 472 and im wondering did anybody ever put a smaller a/c compression on it off another gm and did it work out and how did you manage that modification.

    steelybill and steelybill like this.

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  3. #2
    jayoldschool's Avatar
    jayoldschool is offline GM RWD V8 addict
    Automobile(s): 81 FWB D'Elegance coupe
    Join Date
    Sep 2006
    Ontario, Canada

    Re: 472 a/c conversion

    Don't do it! The old compressor is better than the little ones. Keep it R12, too. If you can't get R12, use an R12 replacement instead of converting to R134a.

  4. #3
    alshaer is offline Cadillac Owners Member
    Automobile(s): Eldorado 1978
    Join Date
    Aug 2012

    Re: 472 a/c conversion

    I got Cadillac eldorado 1978 and I have stock compressor and I use 134 and it work fine

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  6. #4
    man1ey's Avatar
    man1ey is offline Cadillac Owners Member
    Automobile(s): 1968 Deville Convertible
    Join Date
    Aug 2005

    Re: 472 a/c conversion

    I tend to agree with jayoldschool based on my experience with a '68 472. I tried replacing POA with a cycling compressor, got major temp fluctuation; tried diff compressor, never got cool; tried 134a, never got cool. IMO unless you're going to upgrade the condenser, stick with an all-around stock system running R-12.

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