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Where is this fuel leak coming from?

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    Where is this fuel leak coming from?

    My car has been sitting for about a month or so and took it out for a test drive after doing a brake job today. Noticed a strong fuel smell from the driver's side of the car after putting back into the garage, right around the fuel filter area. Also noticed these fuel stains around there (I believe it's on the tank) as well.
    Click image for larger version  Name:	Webp.net-compress-image.jpg Views:	0 Size:	88.5 KB ID:	10045268

    #2
    looks like you have a late model. i would check the fuel level sending unit o-ring, under the back seat, on the LH (driver side) of the car. pretty common place for them to leak.
    '70 911s | '72 2002 | '88 M5 | '89 330is | '89 M3 | '95 911 | '02 M5 | '04 RR HSE

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      #3
      Check the rubber lines and clamps. Also use better clamps that don't dig into the lines.
      "I'd probably take the E30 M3 in this case just because I love that little car, and how tanky that inline 6 is." - thecj

      85 323i M TECH 1 S52 - ALPINEWEISS/SCHWARZE
      88 M3 - LACHSSILBER/SCHWARZE
      89 M3 - ALPINEWEISS II/M TECH CLOTH-ALCANTARA
      91 M TECHNIC CABRIO TURBO - MACAOBLAU/M TECH CLOTH-LEATHER

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        #4
        Was your tank full to the neck? My car does the same if tank is full to the neck and jack up the car from passenger's side lol.
        Just never fill my tank to the neck and it is fine.

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          #5
          Originally posted by e30austin View Post
          looks like you have a late model. i would check the fuel level sending unit o-ring, under the back seat, on the LH (driver side) of the car. pretty common place for them to leak.
          x2. Since the leak appears to be on both sides of the tank, it's kind of a give-away that it's coming from the very top with the only opening being the level sensor up there (not fuel line terminations there, they are all terminated at the passengers side)

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            #6
            Don't forget the hose leading to the expansion tank.

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