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Thread: O-ring size

  1. #1
    Join Date
    Sep 2008
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    '95 M3, '05 GTI, '81 Scirocco S, '93 F250 IDI

    O-ring size

    Anyone happen to know the size of o-ring for the quick connect hose which attaches to the thermostat? Mines leaking after WP/therm replacement. F25 xdrive35i but surely it's the same as it's similar engined sibling. Much thanks in advance. Here's the connector I'm talking about:
    thermhoseconnector.PNG
    2012 X3 Xdrive35i
    '97 M3/4/5 silver/black 92k mi, minty Gone
    '95 Boston/grey M3, bone stock, 147k mi Gone
    R1150GS, '16 Husky FE501 & '23 TE300i, KX500 TImbersled, and stuff

  2. #2
    dworthy's Avatar
    dworthy is online now Wagon meister :) BMW Tech Expert
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    Sadly BMW doesn't post up those sizes on the parts catalog, it's best to just replace the whole hose.

    The other option is to buy a o-ring kit and compare the old one to one from the kit.
    Darin
    Current:
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    M-Flight Member

  3. #3
    Join Date
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    Remove the o-ring and take it to your local hardware store. My True Value has a HUGE assortment of english and metric dimensioned o-rings. Grab a tube of Sil-Glyde. This will help with assembly.

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