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radiator drain plug size

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    radiator drain plug size

    I broke my radiator drain plug at an inconvenient time and needed a new plug.

    I searched everywhere to find the thread size of that plug but not one place would tell me that info. So I went and measured the broken stub after I got it out.

    It is m10x1.5
    This is on a 88 325i

    I bought a m10 bolt and put an oring on it. Works great. It is tight with no leaks

    #2
    just an FYI Mercedes (and probably VW) use the same plug.
    Build thread

    Bimmerlabs

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