MAINTENANCE MANUAL OF ENGINE
136
Chapter 4 Fault analysis and troubleshooting
1. White smoke
Steps
Inspection po-
sition
Fault causes
Troubleshooting
1
Fuel injector
The possible cause is that the
fuel injector pressure is lower
than 23MPa, the fuel is atom-
ized poorly, or there is fuel
leakage.
Repair or change the fuel injector (Re-
fer to Section 3, Chapter 6, Part II)
2
Water tempera-
ture
The cooling water temperature
is too low.
Increase the coolant temperature.
3
Cylinder
The cylinder gasket, cylinder
head or block is damaged.
Replace (Refer to Section 3, Chapter 2,
Part II)
4
Fuel
The fuel contains water.
Remove the water contained in the fuel
in time or change the fuel.
2. Blue smoke
Steps
Inspection
position
Fault causes
Troubleshooting
1
Piston ring
The piston ring is worn excessively, or
the elasticity of the piston ring is insuf-
ficient due to carbon deposit, resulting
in ingression of the engine oil into the
combustion chamber.
Change the piston ring (Refer to
Section 4, Chapter 2, Part II)
2
Engine oil
The engine oil level is too high.
The engine oil level is declined
within the specified range.
3
Gaseous ring
The gaseous ring is installed in a reverse
direction or the open ends are scattered
by less than 180°, resulting in ingres-
sion of engine oil into the combustion
chamber.
Re-install the gas ring (Refer to
Section 3, Chapter 2, Part II)
Summary of Contents for KM/4L22
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