9. Intake/exhaust system
146
Special inspection of turbocharger
You should check the radial and axial clearance of a rotor.
This preventive action is to find the bearing wear status of the
axial clearance so as to prevent the severe damage to the
rotor and bearing.
DV2213034A
DV2213035A
1. Checking the rotating state of a rotor assembly Check tis
rotating state when strange noise is heard during rota-
tion. If you use a sound rod, contact the neb of the sound
rod to the turbocharger housing and slowly raise the
RPM. If high-pitched sound continues, it means that the
state is abnormal. In this case, the bearing or the rotor
assembly may be abnormal. So you need to replace or
repair the turbocharger.
2. Checking the play of rotor assembly Remove a turbo-
charger from the engine, and check the axial and radial
play of the rotor assembly. When you disassemble the
turbocharger, be sure to seal the oil inlet and outlet with
a tape, etc.
1) Axial play of the rotor assembly
DV2213036A
DV2213037A_E
2) Radial clearance
DV2213038A
Wear limit 0.20 mm
Wear limit 0.65 mm
Magnet vise
Turbine wheel room
Dial gauge
Shift the
turbine shaft to
axial direction.
Wear limit : 0.20 mm
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