Operation Manual of WEICHAI GENSET
3 Fault of air filter
Clean the air filter and replace it if
necessary
Too much oil is added in the oil pan,
4
and the oil flows into the combustion
chamber when the diesel engine is
Drain excess oil
running
5
Long-term low-load (40%) operation
increases the clearance between
piston and cylinder liner and causes
oil inflow in the combustion chamber
Increase the load appropriately, or
select a generator set with
appropriate power
The piston ring is stuck or excessively
6
worn. Thus, its elasticity is
insufficient, resulting in oil inflow in
Replace the piston ring
the combustion chamber
(3) White smoke is different from colorless smoke, and it indicates that the smoke
contains moisture or unburned fuel. The white smoke of diesel engine is mixture of
unburned hydrocarbon (including fuel oil and lubricating oil), water vapor and
intermediate products of incomplete combustion (such as oxygenated hydrocarbon).
White smoke is emitted from the exhaust pipe when the diesel engine is just started
or in the cold state is formed by the fuel vapor at low temperature in the cylinder of
the diesel engine. Such situation is more apparent in winter. When the diesel engine
runs in cold weather, the temperature of the diesel engine remains low, so is the
temperature of the exhaust pipe. It is normal that the exhaust vapor condenses into
the steam and forms white exhaust smoke. If white smoke is still emitted when the
temperature of diesel engine and exhaust pipe is normal, it means that the diesel
engine does not function properly and may considered as faulty.
Tab. 4-7 Causes of white smoke from diesel engine
S/N Fault
Treatment method
When the diesel engine is just started
(especially in winter or when the
1 ambient temperature is low), the Normal
unburned fuel mixture will
discharged with the exhaust gas
The cracks of cylinder liner or the
2
damage of cylinder head gasket Contact after-sales service
causes inflow of cooling water in the personnel for repair or replacement
cylinder
3
The poor atomization of fuel injector
and low fuel injection pressure lead
to oil dripping
Contact after-sales service
personnel for repair or replacement
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