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Thread: Bad motor noise 1999 750i

  1. #1
    Join Date
    May 2014
    Location
    paris, france
    Posts
    49
    My Cars
    1998 bmw 750

    Bad motor noise 1999 750i

    Hello everyone.

    I have a bad noise on my engine since last week. I didn t do anything on it...

    Please have a look : https://youtu.be/BAufKlDTZcA

    Any suggestion are welcome.

    Thnaks.

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  2. #2
    Join Date
    Jul 2016
    Location
    Chicago, Illinois
    Posts
    3,842
    My Cars
    are slow
    First thing would be to disconnect the pullies.

  3. #3
    Join Date
    May 2014
    Location
    paris, france
    Posts
    49
    My Cars
    1998 bmw 750
    Thank you for your answer.

    How can I do ? What pulley ?



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  4. #4
    Join Date
    Aug 2011
    Location
    Vancouver, BC
    Posts
    1,604
    My Cars
    1998 750iL Individual
    Quote Originally Posted by mofaw View Post
    Thank you for your answer.

    How can I do ? What pulley ?


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    The belts. There's probably a pulley that's seized.
    Own an E38? Add it to the E38 Registry!

    http://www.e38registry.org/

  5. #5
    Join Date
    May 2014
    Location
    paris, france
    Posts
    49
    My Cars
    1998 bmw 750
    Thank you for your answer. What belt is the most likely to do that. The one for alternator or the one for airconditioning?

    Thanks.

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  6. #6
    Join Date
    May 2014
    Location
    paris, france
    Posts
    49
    My Cars
    1998 bmw 750
    The noise happens as soon as i start.

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  7. #7
    Join Date
    Sep 2007
    Location
    Atlanta, GA
    Posts
    790
    My Cars
    14 F01 750i 14 F10 550i
    The OSV's on the v12's are known to make some weird noises when they fail. Have you checked them?

  8. #8
    Join Date
    May 2014
    Location
    paris, france
    Posts
    49
    My Cars
    1998 bmw 750
    Finally i found out where the noise come from. Low oil level in transmission. Have to fill 1 liter back. Servicing becoming urgent.

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