Isuzu NHR 4J Series Workshop Manual page 31

Checkpoint
Continued from the previous page
OK
Oil level
OK
Turbocharger oil feed pipe
OK
Turbine housing
OK
Compressor housing
OK
Turbine shaft bearings
Trouble Cause
NG
Too low
NG
Contaminated
NG
Restricted
NG
Carbon deposits
NG
Dirty
NG
Worn
SERVICE INFORMATION 00 – 27
Countermeasure
Correct
Replace oil
Repair or replace
Clean
Clean
Replace