The most frequently occurring damages at turbochargers...
Impact damage
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
Dirty oil leads to
turbocharger damages in form of scoring
on 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
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
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
Overheating
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
Overturned
Failure 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.
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