AC o-rings?

Heating, Cooling & AC

  1. Pappy

    Pappy New Member

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    1967 fury III with factory AC .
    Had a local shop refurbish heater and evap cores. Reinstalled heater box (not that easy). Hooking up 2 lines in engine compartment. Replaced the o-rings.
    But the old ones feel more like plastic and are flat instead of round.
    Could this just be from age or are they really plastic.
    Any feedback is appreciated.
    Thx
     
  2. Joseph James

    Joseph James Senior Member

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    I am not the expert but I believe there are differences in R12 and 138A o rings because of pressures and possibly oils.
     
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  3. Trace 300 Hurst

    Trace 300 Hurst Professional Tinkerer FCBO Gold Member

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    Old ones look and feel like plastic because they're.....old. And molded over time to the square shape you mentioned.

    All you need to know (well, not really "all") is that you'll be using green, round, o-rings. They go with any refrigerant/oils.
     
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  4. CanCritter

    CanCritter Senior Member

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  5. live4theking

    live4theking Old Man with a Hat

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    You can also get a box of various sizes from Harbor Freight.
     
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  6. Trace 300 Hurst

    Trace 300 Hurst Professional Tinkerer FCBO Gold Member

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    Or from ANY AdvancedOreillyZoNapa store across the nation for just a few bucks.
     
    Last edited: Jan 15, 2020
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  7. ayilar

    ayilar Senior Member FCBO Gold Member

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    Here is the Santech A/C System O-Ring Gasket Kit MT2551 that I am ordering for Medina, my '71 Monaco. Price is $6.29.
     
  8. twostick

    twostick Senior Member

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    Make sure when you install them that you lube them generously with the compressor oil so they don't tear when you tighten the fitting down.

    Kevin
     
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