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I hear this whining noise coming out of my car. I don't know if it's the belt or the fan. It's reduces when I accelerate.the noise doesn't stop until I turn of the engine or accelerate.

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  • Likely to be the belt, especially if it is a squeaky sort of noise. Dec 22, 2015 at 9:39
  • Could be a bearing on one of your ancillaries, if it is more of a whine than a squeal.
    – HandyHowie
    Dec 22, 2015 at 10:26
  • pop the hood and have a look at the belts, if it is worn you will see small bites missing or cracks or tears. Does you issue get real loud when you crank the wheel to full lock at a standstill and slowly inch forward? If so it's definitely belts. If all the belts look good I would then follow HandyHowie's instructions and start checking bearings.
    – AM_Hawk
    Dec 22, 2015 at 14:51

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I went to the mechanic and he changed the ventil unit and the sound stopped. Thanx guys

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