1
2
Checking axial and radial clearance of turbocharger rotor shaft
77
D Remove turbocharger, see page 75
D Mark turbine housing relative to the bearing
housing
D Remove turbine housing
Axial clearance
Fig. 1
Apply dial gauge holder and dial gauge under pre-
load to shaft end face of the turbine wheel as
shown.
Press rotor shaft against dial gauge. Read and
note down value. Push rotor in opposite direction.
Read and note down value.
The difference between the two is the axial play.
Change turbocharger if axial clearance is ex-
ceeded.
Radial clearance
Radial clearance is measured only on turbine end
with dial gauge or feeler gauge.
Fig. 2
Dial gauge:
Apply dial gauge tip to side of hub. Push turbine
wheel towards dial gauge. Read and note down
value.
Push turbine wheel in opposite direction. Read and
note down value. The difference between the va-
lues is the radial clearance.
Measure at several points.
If the play exceeds the permissible value, ex-
change turbocharger.
D Fit turbine housing. Ensure that the markings
coincide
D Tighten turbine housing bolts to specified
torque
D Installing turbocharger
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