Heard this noise the other day, happens when cold and also at a low ish rev too. Would remind on a pulley bearing but it's not. Seems to be coming from the turbo area. Il try and get a video later here, but anyone ideas? It's not smoking or down on power etc so wondering is it turbo or could it be manifold? 2008 HST TDV8 in Stornoway Grey.

Hi Micky, I think I had this but I seem to recall it was the air pump for the suspension which I believe is below the passenger door sill. It would give a shrill chirp every 30 seconds or so. What do you reckon?

Had this on my Tdv8 ffrr, it was the drivers side exhaust manifold which had warped and snapped most of the studs.
New manifold and a lot of Labour later it was fixed.
Hopefully it’s not that, but potentially it is.

Sorry for not replying just totally forgot!
The noise was as Chugga90 said and was the driver side manifold. Great fun! 2008 HST TDV8 in Stornoway Grey.