High Pitch Whinning Noise when Accelerating

Discussion in 'F10, F11, F07' started by Ottatai, Jun 10, 2019.

  1. Ottatai

    Ottatai New Member

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    Hi guys,

    Recently my F10 520i makes high pitch Whinning noise when accelaring. Mechanic told me my turbo is fine but he changed the vacuum pump, a valve and ignition coils with plugs as well. However the noise is still there. It's getting annoying. Anyone had experienced this before? Thanks in advance!
     
  2. pierreye

    pierreye Club Guest

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    You better check your timing chain rail. All n20 before manufacturing date 3/2015 might have problem the plastic rail broken.
     

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