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Problem
10.
Excessive fuel consump-
tion of engine
11.
Blue smoke coming out of
the exhaust (when idling)
12.
Black smoke coming out of
the exhaust (under load)
13.
Engine produces white
smoke from the exhaust
(at full load)
Probable cause
• Poor or polluted fuel quality
• Defective injector / injection pump
• Incorrect injection moment
• Excessive wear and tear of cylinder / piston
• Insufficient supply of combustion air
• Oil level too high
• Excessive inclination angle of the engine
• Leaking oil seal of the turbo compressor
•
Defecte turbocompressor
•
• Insuffient supply of combustion air
• Leakage in air intake manifold
• Defective injector / injection pump
• Incorrect injection moment
• Incorrect valve clearance
• Excessive wear and tear of cylinder / piston
• Engine overheated, does not reach maximum rpm
• Air inclusion in the fuel system
• Defective injector / injection pump
• Water in the fuel system
• Defective pre-heating plugs
• Incorrect valve clearance
• Incorrect injection moment
• Poor fuel quality or polluted fuel
• Condensation of vapour in the exhaust system, on account of very low
ambient temperature
Problems and solutions 14
Solution
• Check fuel quality. Drain fuel tank and rinse it
well. Fill with good quality fuel
• Check and replace if necessary
• Check / adjust
• Check compression, overhaul engine if neces-
sary
• Check the air intake and the ventilation ope
nings in the engine room
• Lower oil level
• Check / adjust alignment of engine
• Check / replace
•
Check air intake as well as the ventilation
openings in the engine room
•
Check/ replace
•
Check/ replace
•
Check and replace when necessary
•
Check/readjust
•
Readjust
•
Check compression, overhaul the engine if needed.
•
Check the dimensions (diameter and pitch)
of the propeller and replace the propeller if
necessary.
• Check / bleed the system
• Check / replace if necessary
• Check / replace water separator / fuel filter
• Check / replace
• Check / adjust
• Check / adjust
• Check fuel quality. Drain fuel tank and rinse it
well. Fill with good quality fuel
• No problem, no danger
craftsman marine diesel engines CM4.33 / cm4.42
Title part xxx
Subtitle part xxx
39
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