2022 T6.1 150bhp - load whine

Teturtle

New Member
2022 T6.1 150bhp - has a loud whine when accelerating, prob turbo, had a smoke test, no leaks. Mechanic says nothing wrong. Any idea how make quieter as really want to sell it?
 
If the mechanic thinks it OK what makes you think a buyer will find it a problem?
 
Once the noise appears is it engine speed related or road speed related.
 
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