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Engine noise and exhaust smoke colour
Pay attention to engine noise and, if any abnormal noise is
heard, check the engine to detect the cause.
Check the fuel combustion condition by exhaust smoke colour.
The exhaust smoke colour after engine warming-up and at no-
load operation:
{
Colourless or light blue.. . . .
Normal (Perfect combustion)
Black colour . . . . . . . . . . . . . . . . . . Abnormal (Imperfect combustion)
White colour.. .
l
. . . . . . . . . . . . . . Abnormal (Imperfect combustion)
NOTICE:
Engine noise after start-up might be noisy than that of
warmed-up engine and, the exhaust smoke colour also
being more blackish than the normal condition. However,
it will be normalized after warming-up engine.
Leakage in the systems
Check the following items:
l
Lube oil leakage
Check both sides and bottom of the engine assembly for
lube oil leaks, paying particular attention to the lube oil
pressure gauge pipe joint, lube oil filter and lube oil pipe
joints.
l
Fuel leakage
Check the fuel injection pump, fuel lines and fuel filter for
leakage.
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