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4.8 is whining/whistling noise 4.8 is whining/whistling noise
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Old 03-02-2018, 04:55 PM
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Join Date: Jan 2018
Location: Deggendorf, Bavaria, Germany
Posts: 25
hias is on a distinguished road
4.8 is whining/whistling noise
Please take a look at this video: https://streamable.com/iaolr

The noise is starting after 17 seconds in this video when accelerating.

My car is a 2005 4.8is. I have already replaced the alternator which I though was causing the problem. However, now with a new alternator installed, the noise is still there.
I have also replaced the butterfly valve which did not change a thing.

Do you have any ideas?
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