Technical Stilo JTD acceleration/boost noise

[chemomche]

Hi, from some time there is strange noise coming from the front of my stilo when i am on the throttle. It is clearly heart on the highway, over 2k rmp and the more throttle i give the more noisy it is. When i am off the throttle the noise disappears at all.

Here is a short video.



Is this normal?
If not, what can be the cause and how serious the problem is?

 

[XB23]

Sounds like pulley needs replacing the sound isnt too clear on the video

 

[chemomche]

The pulley was replaced when i bought the car 40k km ago.
The sound that bothers me is the one that is heart when accelerating from 80-100km/h and 100-110km/h. You can hear sound similar to tire compressor when you are pumping your tires at the gas station.

 

[MazCinq]

that right there is a massive boost leak, i'm guessing the car is sluggish too and producing black smoke????


common issue is the rubber boost pipe going to the intercooler near where it goes past the inner wheel arch liner, it rubs and wears through causing a leak.