Operation and Maintenance Manual and User Service Guide for Industrial Power WP10 Series Diesel Engine
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6.3 Exhaust system smokes
S/N
Cause
Troubleshooting
1
Gray-white smoke
(1) Diesel engine temperature is very low.
Increase the coolant temperature
at the inlet of engine.
(2) Cylinder leaks water.
Remove the exhaust pipe or
check the cylinder head.
(3) Combustion in cylinder is not
insufficient.
Check the compression pressure
in the fuel injector or cylinder.
2
Gray-brown smoke
(1) Diesel engine is loaded severely.
The load on the engine should
drop.
(2) Some fuel injection pump pumps too
much fuel.
Reduce the load.
(3) Fuel injector fails (for example, if fuel
drips at the nozzle, exhaust system will
intermittently smoke ).
Check the fuel injector or replace
the nozzle.
(4) The advance angle of fuel injection is
insufficient (black smoke or flame comes
from the exhaust system).
Adjust the advance angle of fuel
injection.
3
Blue smoke
(1) With engine still at low temperature, oil
blows into the combustion chamber.
Increase the coolant temperature
at the inlet of engine.
(2) The engine is new.
Prolong the running-in time.
(3) Piston rings wear.
Repair.
6.4 Abnormal noise or vibration during diesel engine running
S/N
Cause
Troubleshooting
1
Premature fuel injection or uneven fuel injection
causes the clear, rhythmic and metallic knocking
noise, especially at starting or low speed.
Adjust the fuel supply
advance angle or adjust the
uniformity of fuel amount.
2
The clearance between the intake valve and
exhaust valve is excessive, making rhythmic and
slight knocking noise.
Adjust valve clearance.
3
Increase the load on diesel engine before being
preheated. The clearance between the piston and
cylinder liner is excessive, making knocking
noise.
Unload diesel engine for
idling and accordingly
warming of diesel engine.
4
The wear of piston, piston ring and cylinder liner
is excessive, making knocking noise.
Replace the related parts
