Hi

Need some advice on this whistling sound...

It's a 2010 superb MK2 with 2.0tdi pd140 engine...200k/miles.

There was a very faint whistling on acceleration/reving but had become louder.

The car is in need of a new dual mass flywheel but what I'm trying to figure out (budget for ) is this noise...does it sound like a vacuum/boost issue OR do I possibly have a failing turbo?

I am booked for the dmf in a couple of weeks time but need a heads up because funds are tight.

If it is a vacuum or boost issue, how do would i best approach locating this (am unable to hear exactly where the whistling is coming from under bonnet

Thank you

To me that sounds like a boost issue - try and check the hoses between the turbo and intercooler for splits or any traces of oil spray on nearby components that might help locate it.