Hi all, been a while since I last asked for advice. Cupra TDI on 70,000 miles, original turbo, revo remap stage 2 with egr only electronically removed (done around 5000 miles ago). Also had cat knocked out. Otherwise standard. Makes a fairly quiet but noticeable whine heard all the time except when accelerating. You can increase the whine pitch on idle by increasing the revs slowly. Garage convident it's the turbo and not a loose belt or tension. After a second opinion of the experts