MTU 12V4000G34F Operating Instructions Manual page 87

Blue exhaust gas
Cause
Too much engine oil in the engine
Oil separator of crankcase
breather contaminated
Exhaust turbocharger, cylinder
head, piston rings or cylinder liner
defective
White exhaust gas
Cause
Engine is not at operating
temperature
Water in fuel
Intercooler leaky
Corrective action
u Drain engine oil (→ Page 174).
u Replace filter (→ Page 120).
u Contact Service.
Corrective action
u Run engine to reach operating temperature.
u Check fuel system on fuel prefilter;
Drain water from fuel prefilter (not switchable) (→ Page 158).
Drain fuel prefilter (switchable) (→ Page 155).
u Contact Service.
MS15060/01E 2018-12 | Troubleshooting | 87