Cause:
Due to residual dirt particles in the oil supply
system of the turbocharger, the axial bearing
may get damaged.

Remedy(5_79):
Control of the axial clearance of the turbocharger bearing and
endoscope check of the cylinders. If there is no visible damage at the
cylinder walls, replacement of the turbocharger, oil and oil filter is
sufficient. If necessary clean the surrounding parts.