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Thread: Mysterious Line by Fuel Filter

  1. #1
    Join Date
    Apr 2019
    Location
    Orlando, FL
    Posts
    2
    My Cars
    1992 BMW 325ic

    Mysterious Line by Fuel Filter

    I was changing out the fuel filter on a 1992 BMW 325ic and changing out some of the hoses that are connected to the fuel filter. There is a line that routes in the same direction with the supply/return and it looks like brake line (the smallest tube, please correct me if I am wrong)? What exactly is that line for, it goes to towards the top of the fuel tank through the bottom.

    I have tried to look on realoem but the diagrams are so split up. The fuel tank diagrams show a line routed on the top with the connection by all the other fuel filter connections, but can't find anything else.

    THis is the closest picture I could find...it's the left most line/hose looking at the bottom of the image.

    Thanks
    -David


  2. #2
    Join Date
    Dec 2005
    Location
    corpus christi, texas
    Posts
    6,738
    My Cars
    No e30s, again :(
    maybe its the return line for the part that collects the fumes? I forget what that deal is called, though
    No e30s again.

  3. #3
    Join Date
    Mar 2007
    Location
    Joliet,IL
    Posts
    1,121
    My Cars
    87 325is 96 GMC Suburban
    Supply, Return, and Evap, plus the brake line

  4. #4
    Join Date
    Dec 2005
    Location
    corpus christi, texas
    Posts
    6,738
    My Cars
    No e30s, again :(
    that's it, evap cannister
    No e30s again.

  5. #5
    Join Date
    Apr 2019
    Location
    Orlando, FL
    Posts
    2
    My Cars
    1992 BMW 325ic
    awesome, thanks for the info!

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