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Thread: 330D M57 2008 E93 loud squealing noise while accelerating

  1. #1
    Join Date
    Apr 2019
    Location
    Finland
    Posts
    12
    My Cars
    BMW 330D E93

    330D M57 2008 E93 loud squealing noise while accelerating

    https://youtu.be/lHPw0_1RBwY

    Does anyone know what could be causing this noise? I dont have any error codes except sometimes additional water pump and mechanic shop is claiming its a bad turbo even though im pretty sure turbo couldnt sound like that and still work since its been making this noise for the last 30000km but its only now starting to get louder. It can be heard the most when i start driving after the car has been sitting for a while but it can also be heard if the car has been turned off for just a couple of minutes after driving or if the car idles for few minutes after driving.

    The car does have a bad stage 1 tune which im getting reset back to factory tune but i dont think that could be the reason or could it?

  2. #2
    Join Date
    Jul 2013
    Location
    Casablanca, Morocco
    Posts
    780
    My Cars
    2001 e46 323i
    I can only hear a relatively faint squealing noise, which appears to be from the turbo indeed. Turbos start squealing with time, which doesn't mean they don't work, just that they are aging.
    "If you have integrity, nothing else matters. If you don't have integrity, nothing else matters." Alan K. Simpson.
    5spd E46 "3XX": 328i engine, 330i Intake and exhaust, CAI, 323i diff.

  3. #3
    Join Date
    Apr 2019
    Location
    Finland
    Posts
    12
    My Cars
    BMW 330D E93
    Yeah the phone mic doesnt really catch the sound but the sound isnt like a normal aging turbo whistle but more like squeal like the turbo wouldnt spin properly and i would think if thats the case the turbo would have exploded a long time ago, I have checked plenty of whistle noise videos on youtube but none of them sound so squealy like mine. Ill try to get a better recording.

  4. #4
    Join Date
    Apr 2019
    Location
    Finland
    Posts
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    My Cars
    BMW 330D E93
    U guys were right, turned out to be a bad turbo, it had aftermarket filter which was the reason the whine sound was a lot louder than usual

  5. #5
    Join Date
    Jul 2013
    Location
    Casablanca, Morocco
    Posts
    780
    My Cars
    2001 e46 323i
    Easy fix then, that's good!

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