Coolant leaks at intercooler
Cause Corrective action
Major coolant discharge at
charge-air cooler. Charge-air
cooler leaky.
u Contact Service.
Black exhaust gas
Cause Corrective action
Air filter clogged. u Check signal ring position of contamination indicator
(→ Page 184).
Injector faulty. u Replace (→ Page 163).
Injection pump faulty. u Replace (→ Page 159).
Overload. u Contact Service.
Blue exhaust gas
Cause Corrective action
Too much oil in engine. u Drain engine oil (→ Page 188).
Oil separator or oil preseparator
of crankcase breather clogged.
u Replace (→ Page 152).
Exhaust turbocharger faulty. u Contact Service.
Cylinder head is faulty. u Contact Service.
Piston rings are defective. u Contact Service.
Cylinder liner defective. u Contact Service.
White exhaust gas
Cause Corrective action
Engine is not at operating
temperature.
u Run engine to reach operating temperature.
Water in fuel. u Check fuel system at fuel prefilter.
Drain fuel prefilter (→ Page 176).
Charge-air cooler leaky. u Contact Service.
132 | Troubleshooting | MW15406/17E 2014-05
TIM-ID: 0000042073 - 001
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