1. 15 Jan 2020 at 10:54 PM #1
    M3NickM3

    M3NickM3 Wearing official robes

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    Went and looked at an E92 today, everything seemed ok.

    Except I noticed a really loud whirring sound, which I think is from the rear. When I say loud, it was masking some of the engine and downshift noise.

    It sometimes sounds like its coming from the front or engine, but I am 90% sure its in the rear.

    When revving stationary, you cant hear it.

    It starts when you pick up speed near 30mph, and the noise gets faster and louder as the speed increases.

    The best way to describe it, is like a UFO flying saucer lol, and the faster you go the faster the whirring sound is.

    Its definitely rotary related, possible something from engine when rotating, but more than likely rear.

    I thought its maybe bearing related, or diff maybe? But when the steering wheel is locked it doesn't have that diff grinding noise Ive had on previous E92's.

    Anyone else had this or something similar?
     
  2. 16 Jan 2020 at 7:32 AM #2
    mattitbo

    mattitbo On the path

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    Hopefully it’s just the hub heat shield rubbing on the disc. Had to bend mine back a bit because of this in the past
     
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  3. 16 Jan 2020 at 12:35 PM #3
    oliver5109

    oliver5109 On the path

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    yeah sounds like this
     
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  4. 16 Jan 2020 at 12:40 PM #4
    bennn

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    Spunds like tyre noise if they are getting toward the end of their life.
     
  5. 16 Jan 2020 at 4:05 PM #5
    SDJ

    SDJ On the path

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    I've never heard a flying saucer come over my way, but I've got a diff (for a manual) if you need one
     
  6. 16 Jan 2020 at 7:24 PM #6
    M3NickM3

    M3NickM3 Wearing official robes

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    Yeah I mentioned this to a couple people today, and all said its quite possible its this.

    Tyre's looked ok, well apart from them being a mix of dunlop and I think pirelli.

    LOL, its a DCT. Thanks though
     
  7. 16 Jan 2020 at 7:36 PM #7
    M3NickM3

    M3NickM3 Wearing official robes

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    I am guessing it needs to go on a ramp and dealt with that way? Or jack it up and remove the wheels? And rev it whilst its off the floor?

    Its not going to be fixed or looked before being sold unfortunately, so I'm not sure if I should take the risk.

    It drives and feels fine, as good as my previous 2. Surely if it was the diff, it would be noticeable not just audibly, but also when driving?
     
  8. 17 Jan 2020 at 11:39 AM #8
    Raif

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    Just to add to what Mattibo said about the disc shield, the trans tunnel heat shield can also touch the prop shaft knuckle making a similar noise. Worth eliminating both as they're 1 minute fixes
     
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