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Thread: E38 740il Need help oil pan problems

  1. #1
    Join Date
    May 2013
    Location
    nc
    Posts
    3
    My Cars
    1997 740il 2008 750li

    What steps should I take

    I have a 1997 e38 740il. It was parked for 3 years and now I'm trying to bring her back to life. Long story short I removed the oil drain plug and a thread was broken . in I served it back in and it got stuck. I applied pressure down and and removed it. Well today I went and got a new plug . It went all the way in and wouldn't lock tight so I removed it. It came out but the threads was boogered. I think the threads in the pan are stripped. If seen some post about moving up to m12 1.75 self tapping bolt. What should I do?

  2. #2
    Join Date
    Jan 2005
    Location
    Japan
    Posts
    54,654
    My Cars
    11/88 E32 750iL+98 E36M3
    Last edited by shogun; 02-19-2018 at 10:12 PM.
    Shogun tricks and tips for the E32 series are HERE!

  3. #3
    Join Date
    Jan 2016
    Location
    Ca
    Posts
    6,981
    My Cars
    2001 525it
    Or replace the lower oil pan

  4. #4
    Join Date
    Jun 2002
    Location
    Aberdeen, NC (yes, again)
    Posts
    23,672
    My Cars
    E39M5, E500 4WD
    Yeah, on that engine, I'd recommend just replacing the lower pan. A helicoil is the wrong choice anyway.

    The pan already used an M12 x 1.5. If you were going to try for a simple drill and tap to a larger size, you'd go to a Mercedes 14 x 1.5

    Really, most salvage places will have a lower oil pan, and that will be your best bet. Don't forget to buy a new gasket !

    Chris Powell
    Racer and Instructor since, well. decades, ok?
    Master Auto Tech, owner of German Motors of Aberdeen
    BMWCCA 274412
    German Motors is hiring ! https://www.bimmerforums.com/forum/s...1#post30831471

  5. #5
    Join Date
    Feb 2009
    Location
    KC North, MO, USA
    Posts
    11,153
    My Cars
    1996 740iL
    Check the bolts on the oil pump while you have the pan off. They are known to work loose on the early E38s. Also make sure there is no debris, i.e. bits of plastic, in the bottom of the oil pan.

  6. #6
    Join Date
    Jun 2002
    Location
    Aberdeen, NC (yes, again)
    Posts
    23,672
    My Cars
    E39M5, E500 4WD
    Yeah, bits of plastic pretty much mean you're doing the timing rail job.

    "Self-tapping bolts" are B.S.. NEVER EVER try that. Do it right, or don't do it.

    Chris Powell
    Racer and Instructor since, well. decades, ok?
    Master Auto Tech, owner of German Motors of Aberdeen
    BMWCCA 274412
    German Motors is hiring ! https://www.bimmerforums.com/forum/s...1#post30831471

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