Inspection
- Periodical Inspection
- Pressure (Oil, Blow-by, Compression)
- Fuel (Fuel consumption, Injection pressure)
- Exhaust (Diesel smoke, HC/CO gas)
- Oil, Coolant..etc
 
Performance test
- Engine out-put
- Fuel consumption
 
Repair work
- Disassembly and assembly
- Test and inspection
 
Rebuilding
- Build-up (Crankshaft)
- Processing (Cylinder head, block...)