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Malfunction
Exhaust fumes are blue
Exhaust fumes are white
Engine "knocks"
Knocking noise from the bearings
Abnormal noises
Cause
Oil level in the engine too high; crankcase
ventilation system faulty, engine oil enter-
ing combustion chamber
Coolant entering combustion chamber
Misfiring
Bearing damage
Leaks in intake pipe and exhaust pipe
causes whistling noise
Turbine or compressor wheel is scraping
against the housing; foreign objects in the
compressor or turbine; seized bearing in
rotating parts
Valve clearance too great
Practical advice
Malfunctions, causes and solutions
Solution
Correct the oil level, have the crank-
case ventilation system checked at a
qualified specialist workshop
Locate damaged cylinder using pres-
sure loss test; visit a qualified special-
ist workshop
Visit a qualified specialist workshop
Visit a qualified specialist workshop
Repair leaks, replace seals if necessary
Have the exhaust gas turbocharger
checked at a qualified specialist work-
shop
Check the valve clearance, adjust if
necessary
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