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Thread: Water gathering in sunroof cassette E31 840

  1. #1
    Join Date
    Oct 2008
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    london
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    840ci

    Water gathering in sunroof cassette E31 840

    Hi guys,

    Wondering if any of you have experience with water gathering in the sunroof cassette and entering the vehicle?

    Is it normal for water to enter the cassette on the basis that it should drain away, or is the sunroof designed to be completely water tight? I’m trying to determine if this is a drainage issue or a seal issue.

    Any advice would be much appreciated.

    Cheers

  2. #2
    Join Date
    Mar 2006
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    Harrisburg, PA, USA
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    374
    My Cars
    x5, 640i, 850Ci, 850CSi
    The drains are there because the sunroof seal is never 100% watertight. That’s the way it’s designed.


    Sent from my iPhone using Tapatalk
    Mike Barrett
    94 850CSi, Hellrot over silbergrau dunkel/silbergrau hell
    96 850Ci, Oxfordgrun over silbergrau hell

  3. #3
    radlaw's Avatar
    radlaw is offline SoCalEights Member BMW CCA Member
    Join Date
    Feb 2010
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    Poway (San Diego), CA USA
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    911
    My Cars
    1995 BMW 840Ci
    Your drains are probably clogged. It is probably both a drain and a seal issue. Replace the seal and clean out the drains.

  4. #4
    Join Date
    Oct 2008
    Location
    london
    Posts
    149
    My Cars
    840ci
    On closer inspection it appears that the drainage holes were blocked. Thanks for the feedback.

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