7. Intake and exhaust system
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(2) Checking and servicing procedures
1) Service interval
2) Checking procedures
a) Check on the conditions of turbine shaft rotation
Check the conditions of turbine shaft rotation by listening to an abnormal sound during rotation.
To make a check using a listening bar, strongly push the end of the bar against the turbocharger
case and gradually increase the engine speed.
In the event of trouble, a high-pitched sound will be produced every 2 to 3 seconds.
When such a phenomenon occurs, the bearing or turbine shaft may be defective. Replace or
overhaul the turbocharger.
b) Check on play in the turbine shaft
Dismount the turbocharger from the engine. Check end play and radial play in the turbine shaft as
shown below.
When the turbocharger is dismounted from the engine, be sure to block the oil inlet/outlet with
gummed cloth tape.
• End play in the turbine shaft
End play
Service standard: 0.03 to 0.06 mm
Wear limit : 0.09 mm
Item Check cycle
Check on conditions of turbine
shaft rotation
Every 500 h
Check on play in the turbine
shaft
Every 1000 h
Overhaul Every 4000 h
Magnet base
Turbine
housing
Move the turbine
shaft in the axial
direction
Dial gauge
010674-00E
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