2007 ISUZU KB P190 Workshop Repair Manual

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Page 793 of 6020

ISUZU KB P190 2007 Workshop Repair Manual 6 – 8 TROUBLESHOOTING
5. Excessive Oil Consumption
Step Action Value(s) Yes No
1 Does the air cleaner element conditon OK? (Clogged
or not) —

Go to Step 2 Clean or
replace the air cl

Page 794 of 6020

ISUZU KB P190 2007 Workshop Repair Manual TROUBLESHOOTING 6 – 9
6. Overheating
Step Action Value(s) Yes No
1 Was the engine coolant level OK? —
Go to Step 2 Replenish the
coolant
2 Was the water leakage or the radiator restric

Page 795 of 6020

ISUZU KB P190 2007 Workshop Repair Manual 6 – 10 TROUBLESHOOTING
8. Dark Exhaust Smoke
Step Action Value(s) Yes No
1 Was the air cleaner element normal condition? —
Go to Step 2 Clean or
replace the air cleaner
element
2 Wa

Page 796 of 6020

ISUZU KB P190 2007 Workshop Repair Manual TROUBLESHOOTING 6 – 11
9. Oil Pressure Does Not Rise
Step Action Value(s) Yes No
1 Was the oil pressure warning lamp working OK? —
Go to Step 2 Replace the oil
pressure
warning lamp
2

Page 797 of 6020

ISUZU KB P190 2007 Workshop Repair Manual 6 – 12 TROUBLESHOOTING
10. Abnormal Engine Noise
10–1 Engine knocking
Step Action Value(s) Yes No
1 Was the injection nozzle pressure or injection spray
pattern OK? —

Go to Step 2

Page 798 of 6020

ISUZU KB P190 2007 Workshop Repair Manual TROUBLESHOOTING 6 – 13
10–3 Continuous noise
Step Action Value(s) Yes No
1 Was the fan belt tension OK? 9 – 13 mm
(0.35 – 0.51
in)
Go to Step 2 Adjust the fan
belt tension.
2 W

Page 799 of 6020

ISUZU KB P190 2007 Workshop Repair Manual 6 – 14 TROUBLESHOOTING
10-5 Excessive turbocharger noise
The vibration noise (the air aspiration noise) occurred when turbocharger rotates, it is normal condition of the
turbocharger, no neces

6 – 14 TROUBLESHOOTING
10-5 Excessive turbocharger noise
The vibration noise (the air aspiration noise) occurred when turbocharger rotates, it is normal condition of the
turbocharger, no necessary any actions.
Step Action Value(s) Yes No
1 Was the excessive noise coming from the turbocharger? —

Go to Step 2 Go to Step 10
2 Inspect the fixing bolts and bands.
Was any problem found? —
Tighten the
loose parts Go to Step 3
3 Was the intake or exhaust system gasket damaged? — Replace the
damaged gasket. Go to Step 4
4 Inspect rotation parts condition.
Was the turbine wheel rotation rough? —
Replace the
turbocharger. Go to Step 5
5 Inspect the turbine wheel.
Was the turbine wheel rubbing against housing? —
Replace the
turbocharger. Go to Step 6
6 Was the turbine wheel damaged? — Replace the
turbocharger. Go to Step 7
7 Were there carbon deposits in the turbine or
compressor housing? —
Clean or
replace the
turbocharger. Go to Step 8
8 Inspect the oil supply condition.
Was the oil feed pipe clogged? —
Repair or
replace the oil feed pipe. Go to Step 9
9 Was the turbine shaft bearing worn? — Replace the
turbocharger. Go to Step 10
10 Are any DTC stored? — Go to indicated
DTC Solved

11. Rotating Part Wear of Turbocharger
Step Action Value(s) Yes No
1 Inspect engine oil.
Was it contaminated with foreign materials? —
Replace the
engine oil Go to Step 2
2 Was the recommended engine oil grade/viscosity
being used? API CD or
ISUZU
genuine/ 10W –30
Go to Step 3 Replace the
engine oil
3 Was the oil feed pipe restricted? — Clean or
replace the oil feed pipe Go to Step 4
4 Was the oil seal of turbocharger defective? — Replace the oil
seal Go to Step 5
5 Was the center housing oil drain passage clogged? — Clean center
housing or
replace the
turbocharger Go to Step 6
6 Was there oil sludge and/or coking on the turbine
shaft? —
Replace the
turbocharger Go to Step 7
7 Are any DTC stored? — Go to indicated
DTC Solved

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ISUZU KB P190 2007

Page 800 of 6020

ISUZU KB P190 2007 Workshop Repair Manual TROUBLESHOOTING 6 – 15
12. Oil Leakage from Turbocharger
Step Action Value(s) Yes No
1 Inspect the oil leakage area.
Was the oil feed pipe eye bolt loose or the gasket
broken? —
Tight

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