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Thread: Warm/Hot Shifter Box

  1. #1
    Join Date
    Apr 2017
    Location
    San Diego, CA
    Posts
    232
    My Cars
    90' 735iL, 90' 535i, 93'

    Warm/Hot Shifter Box

    Hello all! I hope you are enjoying some fine summer wrenching. I haven't had any need to post lately but I've discovered a great project for the "dog days" of summer.

    Recently I've discovered that my gear shifter box is getting abnormally warm while driving. It seems to be worse when I am using one of the cigarette lighter ports to charge my phone. I've even had a couple of the chargers get very hot and cease operating.

    Pic of the part in question https://drive.google.com/file/d/1F5R...w?usp=drivesdk

    Is there an amp limit on those cigarette lighter ports?
    Is that gear shifter box supposed to get that warm?

    Thanks in advance for any insight on this!!

  2. #2
    Join Date
    May 2017
    Location
    Sydney, Australia
    Posts
    15
    My Cars
    1992 BMW 735iL
    I have the same issue. What happens with mine is the shifter would be lukewarm after arriving to my destination e.g. 30km trip. Sits for a while then gets hot very quickly after I start it up again and drive back.

  3. #3
    Join Date
    Jan 2005
    Location
    Japan
    Posts
    54,655
    My Cars
    11/88 E32 750iL+98 E36M3
    Maybe something burnt inside, clean it http://www.bimmerboard.com/forums/posts/744694/
    http://www.bimmerboard.com/forums/posts/872371/
    http://www.nmia.com/~dgnrg/page_13.htm

    It usually gets warm. Cigarette lighter is fused, see fusebox fuse for the Amps.
    Shogun tricks and tips for the E32 series are HERE!

  4. #4
    Join Date
    Oct 2007
    Location
    Boca Raton, Florida
    Posts
    1,558
    My Cars
    89'750iL,98'740iL,00'M5
    The rod coming out of there gets warm on mine. Down here in Florida if I dont run the A/C, it seems to get really hot really quick. As long as the A/C is running and keeping the interior cool, it is barely noticable. Maybe you have a hole in the heat shield?

    BMW 7er Website www.7er.com
    1989 BMW 735i Schwarz (sadly, sold) // 1989 BMW 750iL Cirrusblau Metallic // 1998 BMW 740iL Oxfordgrün Metallic // 2000 M5 Carbon Schwarz ///

  5. #5
    Join Date
    Jan 2005
    Location
    Japan
    Posts
    54,655
    My Cars
    11/88 E32 750iL+98 E36M3
    Looks like all get warm a bit. As Serge says, check the heat insulation from below. Also reconfirm that the heat insulation engine compartment is installed, especially item 23, also called engine splash guard under the engine
    https://www.realoem.com/bmw/enUS/sho...diagId=51_7982
    If that part is missing, cooling air for the cpl. drive train is not going the correct way. The engine bay is designed with the heat insulation as almost enclosed capsule, this includes even the hood sealing. Air is pulled by the visco fan and aux fan into the engine bay to cool the engine, then it should pass along the transmission and cool the trans
    Shogun tricks and tips for the E32 series are HERE!

  6. #6
    Join Date
    Dec 2005
    Location
    Baltimore, MD
    Posts
    365
    My Cars
    81 Scirocco-92 750il
    Make sure your cat isn't clogged and producing more heat than it should.

  7. #7
    Join Date
    Apr 2017
    Location
    San Diego, CA
    Posts
    232
    My Cars
    90' 735iL, 90' 535i, 93'
    I greatly appreciate all the input. I will inspect the heat shield around that area next time I'm underneath the vehicle. But the general consensus of the forum seems to be "don't stress it".

    Like I said originally, dog days of summer. I will also look into that clogged cat (I'm sure there is a post on it already).

    Thanks again as always!

  8. #8
    Join Date
    Aug 2007
    Location
    Albuquerque, NM
    Posts
    1,206
    My Cars
    way too many
    When I still had the automatic transmission, the shift lever ran a lot cooler after doing a few periodic 4-quart drain & fills with full synthetic ATF.
    ​"The US Olympics bobsled team has renamed their sled 'Biden' because nothing has taken America downhill faster"

    TheStigg (aka "gale")
    92 735i 5-spd, turbo pending
    89 535i 5-spd (may she rest in pieces)
    94 325ic 5-spd
    87 325is

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