Xinchai 490B Series Manual page 43

6.4 Blue Exhaust Smoke
Cause of trouble
Piston rings worn or stuck, oil
entering combustion
chamber
Oil level too high
Wrong installation of rings
Contact with Xinchai service
station
6.5 High white exhaust smoke
Cause of trouble
Too small advance angle
Too low injection pressure,
poor atomization or nozzle
dripping
Too low water temperature
Water entering combustion
chamber
Contact with Xinchai service
station
Remedies
The side marked with "up" should face upward
Remedies
Check, adjust repair or change faulty nozzle
Clean or change piston rings
Drain out excessive oil
Adjust the advance angle
Increase water temperature
Check cylinder head gasket
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