Isuzu 4JA1 Workshop Manual page 17

12. Oil Leakage from Turbocharger
Step
1 Inspect the oil leakage area.
Was the oil feed pipe eye bolt loose or the gasket
broken?
2 Were the V band fixing faces tight?
3 Was there oil leakage from the flange of the turbine
housing?
4 Was there oil leakage from the flange of compressor
housing?
5 Are any DTC stored?
13. Insufficient Acceleration and/or Lack of Power due to turbocharger
Step
1 Inspect the air or exhaust route.
Was the air and/or exhaust gas piping loose?
2 Inspect the work of waste gate valve control.
Was there rust on the linkage rod or pin of the waste
gate valve?
3 Was air leakage found from the actuator piping?
4 Inspect the inside of the turbocharger.
Was the turbine shaft end nut loose?
5 Were the turbine blades bent?
6 Was the turbine wheel rubbing against housing?
7 Are any DTC stored?
Action
Action
TROUBLESHOOTING 6 – 15
Value(s) Yes
— Tighten the eye
bolt or replace
the gasket.
— Tighten band or
replace the
turbocharger
— Replace the
turbocharger
— Tighten the bolt
and/or hose
clamp.
— Go to indicated
DTC
Value(s) Yes
— Tighten flange
bolts or hose
clamp.
—
Replace the
turbocharger
— Repair or
replace the
actuator pipe or
hose/
— Replace the
turbocharger
— Replace the
turbocharger
— Replace the
turbocharger
— Go to indicated
DTC
No
Go to Step 2
Go to Step 3
Go to Step 4
Go to Step 5
Solved
No
Go to Step 2
Go to Step 3
Go to Step 4
Go to Step 5
Go to Step 6
Go to Step 7
Solved