ML 270CDI 2004 auto Turbo whine that isnt the turbo as new one just fitted

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mike150256

New Member
Joined
Apr 4, 2019
Messages
5
Location
Blackpool
Car
C200 CDI Avantgarde se auto
mercedes ML 270cdi 2004 auto
can anyone give me some advice or suggestions.
my engine is perfectly quiet when cruising or light acceleration. however when accelrating moderate to hard ( turbo boost ) i have a loud whine, as i already had an oil leak from the turbo i decided to replace the turbo. no more oil leak but this whine is still there. so cannot be the turbo, ive checked everything on the engine but nothing obvious visible, this only occurs when the engine is under turbo boost. running out of ideas , as apart from the noise the car drives perfectly.

any ideas or advise would be gratefully received
thanks
 

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