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Thread: E63 SMG smell and smoke N

  1. #1
    Join Date
    Jul 2016
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    Denmark
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    BMW 645Ci

    E63 SMG smell and smoke N

    Hi,

    I have been searching and cannot really find anything, so hopefully not double posting.

    I own a 2004 645Ci SMG and lately i have had trouble with:
    When starting the engine (in N) and letting it idle for about 30+ seconds it starts to smell. Smell of clutch! After another little while the garage is filled with white smoke.

    The car drives very fine i have had this happen 4 times our about 3-4 months.

    Only one time i got the TRansmission failsafe warning about only 1st and 3rd gear being available, but all gears where there and it drives fine.

    Taking it to an independant shop in a couple of days, but i would really like a heads up, to what is causing this. Have been reading a little about CPS and pumps.

  2. #2
    Pelican Parts's Avatar
    Pelican Parts is offline Senior Member Supporting Vendor
    Join Date
    Aug 2013
    Location
    Harbor City, CA
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    '02 E39 Touring
    Hello and welcome to the forum! Having the codes pulled (there should be stored codes even if you're not getting any warnings on the dash) when you bring in the car to the shop should give you a definitive answer as to where the issue is.
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  3. #3
    Join Date
    Jul 2016
    Location
    Denmark
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    BMW 645Ci
    Quote Originally Posted by Pelican Parts View Post
    Hello and welcome to the forum! Having the codes pulled (there should be stored codes even if you're not getting any warnings on the dash) when you bring in the car to the shop should give you a definitive answer as to where the issue is.
    Yes, sure... I was just seeking advice and or expirience if anybody else had the same issue.

    It is squeeking btw - like if some fool drives with the handbrake pulled... sound is just coming from the clutch. After a kilometer it stops.

    The shop was not too optimistic about SMG transmission and didn't promise to fix, but have a look. Might end up at the dealership afterall (which i hope won't be the case duo to the overcharge)

  4. #4
    Join Date
    Mar 2014
    Posts
    16
    Don't bring it to BMW, they are clueless regarding the SMG.

    Check clutch actuator if its leaking hydraulic oil on the clutch. This is the most common issue of the Non-M SMGs.

  5. #5
    Join Date
    Jul 2016
    Location
    Denmark
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    My Cars
    BMW 645Ci
    So i have an update. The squueeqing noise end smell of burned clutch ... and smoke... seems to have its origin from a worn out V belt... the one for the aircondition. Hanging in a thin thread. No error codes on the gearbox, that transmission warning might have been a false reading and no more than a coincidence.

    Fingers crossed gonna have the belt changed tommorow.

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