4.2TDI Engine Noise

[Chaz]

I noticed today when I left the office I had a noise, sounded like it was in time with the engine or wheel.

So got home and opened the window and heard it again. Put the car in neutral while moving forward, noise spins up, so its engine related.

So I took the cover off and recorded this.

Engine pulls well, no warnings. It was serviced 2 weeks ago, so unless its related to the service, not sure.

Thoughts?

Googling 4.2TDI issues doesnt raise much .... these engines are normally bomb proof?

https://www.youtube.com/watch?v=ZoxpQNXDl-s