DURING DAILY ROUNDS OF THE ENGINE ROOM, CHECKING THE EXHAUST TEMPERATURE IS A NORMAL AND MOST IMPORTANT OBSERVATION. IT TELLS THE WORKING CONDITION OF THE ENGINE AND ANY POSSIBLE DEVIATION MAY POINT TOWARDS POSSIBLE PROBLEM IN THE SYSTEM.
IF THE EXHAUST TEMPERATURE INCREASES THEN IT MAY BE DUE TO FOLLOWING PROBLEMS :-
A) WHEN EXHAUST TEMPERATURE OF ONLY ONE UNIT INCREASES :-
- TAPPET CLEARANCE INCREASES.
- EXHAUST MANIFOLD GOT CHOCK.
- INCREASE IN PISTON CLEARANCE LEADING TO BLOWPAST IN DECREASE IN COMPRESSION PRESSURE. HENCE INCOMPLETE COMBUSTION AND INCREASE IN EXHAUST TEMPERATURE.
- LEAKY EXHAUST VALVE
- LEAKY FUEL INJECTOR
- FUEL PUMP TIMING TO BE CHECKED.
- IN CASE OF MAIN ENGINE, SCAVENGE FIRE CAN ALSO LEAD TO HIGH EXHAUST TEMPERATURE.
- FUEL PUMP RACK LINKAGE MORE INSIDE THAN NORMAL
B) WHEN EXHAUST TEMPERATURE OF ALL UNIT INCREASES :-
- TURBOCHARGER FOULING.
- AIR FILTER OF TURBOCHARGER FOULED.
- AIR COOLER CHOCKED ON WATER SIDE.
- AIR SIDE FOULED OF AIR COOLER.
- FUEL OIL TEMPERATURE DECREASES LEADING TO PROBLEM IN ATOMIZATION.
- GOVERNOR PROBLEM.
3 responses to “REASON FOR HIGH EXHAUST TEMPERATURE”
Experienced same in one of the generator onboard and fuel pump timing was the cause.
The engine trips at any increase in load above 40% with heavy dark exhaust fume and high exhaust temperature.
The points listed are relevant and very important and will surely assist in troubleshooting.
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