Whining noise from turbocharger (A20NFT/LHU)

Criteria	Event
A little whining noise is normal. Compare with a known car which works well.
Worn bearings in the turbocharger	Check visually to see whether there is contact between the compressor impeller and housing. Check for worn or damaged bearings to the turbocharger. Check for axial clearance which causes the compressor pinion to catch the casing.