Impact damage


Damaged compressor wheel Run in blades Impact damage because of penetration of foreign elements into the turbine- or compressor housing can be clearly seen at the compressor- and turbine wheel. By installation of a new turbocharger the induction air channel and the exhaust-fume collector have to be inspected in regards of foreign elements.
Attention! Turbocharger with above mentioned damages must not continue to work by any means.
Damaged compressor wheel Run in blades
Dirty Oil


dirt scoring on bearing seat dirt scoring on bearing surface Dirty oil leads to turbocharger damages in form of scoringon the bearing surfaces. Where does dirty oil come from?
1.) Sometimes after motor reconditioning because of insufficiently cleaned oil channels in the engine
2.) Abrasion because of engine attrition
3.) Inferior value oil
4.) Low quality or clogged oil filter
Dirt scoring
on bearing seat surfaces
Dirt scoring
on bearing surfaces
Disturbance of the oil supply


strong wear traces on bearing   Repeated, a few seconds lasting oil deficiency leads zu heavy wear marks on the bearing surfaces of the turbocharger.
1.) Installation of the turbocharger without prefilling of the lubrication system
2.) Oil and filter exchange
3.) Oil thinning by fuel/glycol
4.) Longer engine time out
5.) Operation in excessive sloping position
Strong wear traces
on Bearing
Oil deficiency


overheated rotor shaft overheated axel thrust bearing A long lasting oil deficiency at the turbocharger leads to heavy wear marks on the bearing and seal surfaces as well as to a blue colored rotor shaft.
Causes herefor can be:
1.) Breaking or narrowing of the oil pipe
2.) Failure of the oil pump
3.) Low oil level
4.) Carbon sedimentation in the oil pipe
Overheating damage
to rotor shaft
Overheating damage
to the axial-thrust bearing



carbon deposits on rotor shaft Failure because of excessive high exhaust-fume temperatures or because of frequent turn offs of the engine without sufficient cooling periods leads to carbon sedimentations on the turbocharger and in the oil pipes, The bearing on the side of the turbine and the piston ring seal are extremely affected. Possible causes for this can be:
1.) Clogging/narrowing of the induction air filter
2.) Heated turn off of the engine
3.) Inferior value oil
4.) Incorrect engine adjustment
Carbon deposit
on rotor shaft


heavy wear on spacerheavy wear on axel thrust bearingFailure because of high speed range of turbocharger on tuned vehicles or leaking pressure hoses between turbocharger and induction tube.
Because of the excessive speed range an extremely high vacuum builds up in before the compressor wheel, which causes the spacer as well as the axial-thrust to wear out quickly.
Heavy wear marks
at the spacer
Heavy wear marks
at the axial-thrust bearing