Exhaust temperature rises on all cylinders
MAN B&W L23/30H technical information, four-stroke auxiliary diesel engine (generating set)
Possible cause
Charge air cooler ineffective, fouled air/gas passages, poor fuel, wrong camshaft position
What to do
Manufacturer's manual, p. 37Clean coolers and filters, water-wash turbine, check Pmax and camshaft
See the assembly on the 3D model
Other MAN B&W L23/30H technical information faults
Exhaust temperature rises on one cylinderDefective fuel valve, leaking exhaust valve, blow-by, damaged fuel camExhaust temperature drops on one cylinderAir in fuel pump, sticking fuel valve spindle, sticking pump plungerEngine rpm dropsLow fuel pressure, water in fuel, governor or valve faults, increased frictionSmoky exhaust in normal runningFouled turbocharger, defective nozzles, low air supplyExhaust valve knockingLoose adjusting screw, damaged push-rod discLube oil pressure failsPump defective, filters or cooler fouledEngine does not turn on startLow air pressure, main valve closed, pinion not engaging, start valve stuck, electrical fault
From the manufacturer's manual “MAN L23-30H technical information”. Check against the original on board before work.