Aux. Engine: Abnormal Noise

Phenomenon1: Knocking
Reasons & Countermeasures:
1. Abnormal combustion, due to:
a. Overcooling Of Engine.
Countermeasure: Warm Up The Engine.
b. Defective Fuel Oil Injection Pump.
Countermeasure: Maintenance/Repair.
c. Faulty Spraying By Fuel Oil Injection Nozzle.
Countermeasure: Maintenance/Replacement.
d. Improper Fuel Oil Properties.
Countermeasure: Use High-Grade Oil.

Phenomenon2: Turbocharger surging.
Reasons & Countermeasures:
1. Improper load conditions.
(Due to: *sticking of Rack,
*sticking of plunger,
*faulty delivery/isobaric valve)
Countermeasure: change the load properly.

2. Defective Turbocharger:
a. Fouled Blower Side.
Countermeasure: Clean.
b. Fouled Turbine Side.
Countermeasure: Clean.
c. Deformed Or Damaged Parts (Diffuser, Turbine Nozzle, Turbine Rotor)
Countermeasure: Replace.

3. Fouled/Clogged Air Cooler Fin.
Countermeasure: Clean.

4. Clogged (Resistance: High) Exhaust Outlet (Exhaust Pipe).
Countermeasure: Clean.

5. Defective Fuel Oil Injection Pump.
Countermeasure: Maintenance/Replacement.

6. Faulty spraying by fuel oil injection nozzle.
Countermeasure: Maintenance/Replacement.