ok so i run my vec 150 cdti as a taxi,
there is a squeal that is emitted from the engine and i have pinpointed it down to where the turbo sits i think which is front right of the car?

now it sounds like a pressurised noise almot like a pipe with a split but after much hunting on the car and online ive had no success in finding anything similar.

any ideas first of all?

im going to try and get a video of it and link it on here next.

ps while monitoring my boost pressure when the noise is on the boost drops until the noise stops then is back up to normal. but the turbo sounds fine and it pulls just as strong so leans me towards a drop in system pressure via a hose.

anyways theres some food for thoughts for anyone with knowledge on here.