MTU 8V2000Mx4x Operating Instructions Manual page 62

Engine speed not steady
Cause
Fuel injection: Injector defective
Speed transmitter defective
Air in fuel system
Engine Control Unit defective
Charge-air temperature too high
Cause
Incorrect coolant concentration
Charge-air cooler clogged
Engine room: Air-intake
temperature too high
Charge-air pressure too low
Cause
Air supply: Air filter clogged
Charge-air cooler contaminated
Exhaust turbocharger defective
Coolant leaks at charge-air cooler
Cause
Charge-air cooler leaking, major
coolant discharge
Black exhaust gas
Cause
Air supply: Air filter clogged
Fuel injection: Injector defective
Engine: Overload
Blue exhaust gas
Cause
Too much engine oil in the engine
Oil separator or oil pre-separator
of crankcase breather clogged
Exhaust turbocharger, cylinder
head, piston rings, cylinder liner
defective
62 | Troubleshooting | MS150060/04E 2016-02
Corrective action
u Replace (→ Page 84).
u Contact Service.
u Vent fuel system (→ Page 87).
u Contact Service.
Corrective action
u Check (MTU test kit).
u Contact Service.
u Check fans and air supply/ventilation ducts.
Corrective action
u Check signal ring position of service indicator (→ Page 101).
u Contact Service.
u Contact Service.
Corrective action
u Contact Service.
Corrective action
u Check signal ring position of service indicator (→ Page 101).
u Replace (→ Page 84).
u Contact Service.
Corrective action
u Drain engine oil (→ Page 104).
1. Clean preseparator (→ Page 77).
2. Replace oil separator element (→ Page 78).
u Contact Service.