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Thread: 134A Schrader valve leak

  1. #1
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    134A Schrader valve leak

    Hi everyone.. I have a slight freon leak from the schrader valve located beside the condenser. Question is... do I need to replace the whole condenser or just the valve? If it's just the valve, is it a generic one used in other cars or is it an MB specific part.

    Can someone share the part number please.

    Regards.

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  3. #2
    E500E Guru emerydc8's Avatar
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    Re: 134A Schrader valve leak

    This is from a 1995 E420 but I think the valve is the same.
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    Last edited by emerydc8; 3 Weeks Ago at 03:03 AM.
    Jon D.
    1994 E420
    1995 E420

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  5. #3
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    Re: 134A Schrader valve leak

    Great! Thanks Jon.

  6. #4
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    Re: 134A Schrader valve leak

    The valve can be replaced separately. Only use OE / Genuine MB valves. I bought aftermarket (too cheap to resist) and was not impressed with the design or build quality. I bought a new OE valve and it was visibly different. I haven't installed yet, need to discharge / evac the system, etc.

    The valve at the low-pressure service port is different of course, I'd consider changing both while the system is open.

    Dave M.
    1997 E420 (Bugeyes)
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  7. #5
    Mercedes Flopper
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    Re: 134A Schrader valve leak

    Pretty sure a bicycle valve will work. I've repaired them with puncture repair kits from walmart

  8. #6
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    Re: 134A Schrader valve leak

    Quote Originally Posted by alabbasi View Post
    Pretty sure a bicycle valve will work. I've repaired them with puncture repair kits from walmart
    Nope. The 134a ports do not use replaceable Schrader valves like the older R-12 ports. With 134a, you have to unscrew the entire port from the pipe. At least, the ones I've seen do not appear to have removable internal parts.

    Aftermarket high-side port is ~$5, OE is ~$19 list.

    https://www.ecstuning.com/b-genuine-...ve/0028305484/

    https://www.mboemparts.com/oem-parts...lve-0028305484
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  9. #7
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    Re: 134A Schrader valve leak

    Why R-12 totally rocks !!!

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