2011 Twingo 2 RS engine whistles whilst cold above 2000 rpm

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FATBOB

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Nov 4, 2022
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Geisenfeld, Germany
Any one have any idea what could be the source of a kind of whistle from the right hand side of the engine when looking into the open engine bay? Seems to go away once the engine reaches operating temperature.

I have tried removing the air box and pushing in the clutch, no change. No belts on this side, so not really sure what it could be and if should worry...

Rob
 
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