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Air Conditioning...R12 to 134

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by Eric78K5, Jul 22, 2000.

  1. Eric78K5

    Eric78K5 1/2 ton status

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    I have a 78 with the older style long compressor. Can I convert this to 134, or do I have to buy the new type compressor?
     
  2. Michael

    Michael 1/2 ton status

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  3. OLDSTEEL

    OLDSTEEL 1/2 ton status

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    It was easy to do on my 74, but it is not as cool as R-12. The difference is only a few degrees warmer, so you will not really notice it.

    74 K5

    Leave it like you found it, or better!
     
  4. turbo

    turbo 1/2 ton status

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    134 less cool leaks out faster higher high side pressure hard on compressor and fairly toxic.

    You would be much happier with hydrocarbon ie isobutane propane mix.
    Only need about 33% of R12 charge weight with around 40% isobutane and 60% propane.
    Can roll your own using camping stove fuel cans or just buy duracool or enviorsafe.
    As cool as R12 lower pressure much cheeper and not toxic.

    I am much happier with hydrocarbon then i was with the 134 conversion.
     
  5. Eric78K5

    Eric78K5 1/2 ton status

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    Ok, so maybe I should keep it as R12. Anyone know what the cost is to have it serviced?
     

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