Loud Fuel Filter?

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  • enigmaticdream
    E30 Addict
    • Jan 2010
    • 572

    #1

    Loud Fuel Filter?

    For a while now I've heard a sound like air escaping from somewhere under the car. I figured it might be the section between the cats and the final exhaust. So, this weekend I got under the car and tightened the bolts there. It turned out to be the fuel filter.

    I replaced the fuel filter maybe 1000 miles ago. You can definitely tell it is the fuel filter if you put your ear near it. Is it normal for new fuel filters to make that sound? My old one had a 1997 date stamped on it and didn't make any noise. I'm assuming the sound is a good thing and it means my filter is actually doing its job.

    Thoughts?

    Also, the car has no issues with starting, idling, etc.
    1986 911 Supercharged Frakenstrat/Stripped
    1987 325is Delphin/Black (Olga)
    1988 M3 Zinno/Natur (Elsa)

    Manual or STFU

    E30 Chapter of BMW Car Club of America
    E30 Oktoberfest 2017
  • jlevie
    R3V OG
    • Nov 2006
    • 13530

    #2
    I can't see how a filter would make noise, but the pump mounted above the filter on an early car certainly can make noise when it is worn.
    The car makes it possible, but the driver makes it happen.
    Jim Levie, Huntsville, AL

    Comment

    • 87e30
      R3V Elite
      • Jul 2008
      • 5676

      #3
      Originally posted by jlevie
      I can't see how a filter would make noise, but the pump mounted above the filter on an early car certainly can make noise when it is worn.
      My thoughts. My pump would whine when running.
      Originally posted by z31maniac
      I just hate everyone.

      No need for discretion.

      Comment

      • PReta
        E30 Enthusiast
        • Sep 2008
        • 1091

        #4
        i think it might be the fuel pump. i can hear my external pump over my engine and exhaust.. i also thought it was my exhaust but found out it was the pump.
        -Paolo
        1986 325e RIP.
        1989 525i
        1986 635CSI

        Comment

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