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Thread: persistant coolant leak

  1. #1
    Join Date
    Jul 2023
    Location
    maumee, ohio
    Posts
    1
    My Cars
    2004 bmw z4

    persistant coolant leak

    2004 Z4 with leak where lower hose connects to radiator. Tried 3 new hoses and a new radiator, and still leaks in the same location.

  2. #2
    Join Date
    Oct 2012
    Location
    Victoria BC Canada
    Posts
    378
    My Cars
    2004 Z4, 1700 Nomad MC
    Are you sure it’s the radiator hose/radiator … or is it the temperature sensor on the lower hose that is leaking.

    If not try a little bit of silicone lubricant/grease on the o rings and try again. The silicon lubricant/grease won’t harm the cooling system if used sparingly…vs… slapping on “gobs” of lubricant.


    Sent from my iPhone using Tapatalk

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