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Thread: 750 Air Pump Hose Longevity

  1. #1
    Join Date
    May 2011
    Location
    Northwest Ohio
    Posts
    809
    My Cars
    2001 750iL

    750 Air Pump Hose Longevity

    I replaced these two hoses 3 years ago when I did water pump and intake manifold gaskets. Had to replace these when I replaced the alternator last week as one had melted through.

    Are these a high wear item? I've only put 25K miles on since then.

    airhoseCapture.JPG
    Last edited by absolutezero273; 07-21-2018 at 07:17 PM.
    2005 X5 4.8is (DD winter) * 2001 750iL (DD summer) * 2001 Ford Excursion 7.3 L <> 2005 X5 3.0 * 2003 X5 4.4i * 2009 X3 3.0 * 2009 X5 3.0 * 2007 Toyota Avalon Limited

  2. #2
    Join Date
    Feb 2013
    Location
    The Motor City
    Posts
    5,719
    My Cars
    1997 750 IL
    Seems like the check valves are not working or leaking and letting exhaust heat get into those lines.
    ---- Processing Individual ----
    Z1XX Upholstery
    Seats front and back in Epingle / leather englishgruen,
    As Schl.Nr. B9EG.
    Front seat backrest in Montana Englishgruen (No. 8 174 861)
    Other interior equipment as for Volleder Nappa englischgruen,
    Schl.Nr. P5EG

  3. #3
    Join Date
    May 2011
    Location
    Northwest Ohio
    Posts
    809
    My Cars
    2001 750iL
    Thanks xboss. I figured it was exhaust gasses getting in there somehow but didn't know the system enough yet. I'm guessing those valves are not serviceable are they?
    2005 X5 4.8is (DD winter) * 2001 750iL (DD summer) * 2001 Ford Excursion 7.3 L <> 2005 X5 3.0 * 2003 X5 4.4i * 2009 X3 3.0 * 2009 X5 3.0 * 2007 Toyota Avalon Limited

  4. #4
    Join Date
    Nov 2016
    Location
    NY
    Posts
    2,665
    My Cars
    750IL/540iT/R53/E46Vert
    Any codes?

  5. #5
    Join Date
    May 2011
    Location
    Northwest Ohio
    Posts
    809
    My Cars
    2001 750iL
    No. No codes thrown.
    2005 X5 4.8is (DD winter) * 2001 750iL (DD summer) * 2001 Ford Excursion 7.3 L <> 2005 X5 3.0 * 2003 X5 4.4i * 2009 X3 3.0 * 2009 X5 3.0 * 2007 Toyota Avalon Limited

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