Main Engine 4-Stroke · Main Engines (4-Stroke)
The Pielstick 14VPC2.5 is a medium‑speed, V‑14 cylinder diesel engine delivering about 9 800 kW at 600 rpm, primarily used as main propulsion on large commercial vessels.
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| Fuel Injectors (cleaning/overhaul) | 1,500 - 3,000 hours |
|---|---|
| Exhaust Valves (overhaul/grinding) | 3,000 - 6,000 hours |
| Piston Overhaul (top end, rings/liner inspection) | 8,000 - 12,000 hours |
| Fuel Pumps (elements inspection/renewal) | 8,000 - 12,000 hours |
| Turbocharger Minor Overhaul (cleaning/bearing inspection) | 4,000 - 8,000 hours |
| Turbocharger Major Overhaul (full strip-down/balancing) | 12,000 - 16,000 hours |
| Main & Crankpin Bearings (inspection/renewal) | 16,000 - 24,000 hours |
| Crankcase Relief Valves (inspection/overhaul) | 12,000 hours |
| Cylinder Liner (max wear at top ring TDC) | 0.6 - 0.8 mm |
|---|---|
| Piston Ring Grooves (max axial clearance) | 0.2 - 0.3 mm |
| Main & Crankpin Bearings (max clearance, plastigauge) | 0.15 - 0.25 mm |
| Exhaust Valve Seat (max recession) | 2.0 - 3.0 mm (or as per manufacturer's specific gauge) |
| Crankshaft Deflection (max deviation between adjacent throws) | 0.05 - 0.10 mm |
Ranges are typical for this design class. Always confirm against the manufacturer documentation for your serial number.
During class surveys (annual, intermediate, special), surveyors typically focus on: 1. Verification of all engine safety devices (overspeed trip, low LO pressure, high CW temp, emergency stops) and their alarm/shutdown setpoints. 2. Inspection of crankcase relief valves, flame traps, and their securing arrangements. 3. Assessment of engine foundation bolts for tightness, chocking condition, and signs of fretting or movement. 4. General visual inspection for oil, fuel, and water leakages, corrosion, and overall cleanliness. 5. Functionality check of remote and local control systems, including governor response. 6. Integrity of high-pressure fuel oil pipes, shielding, and leakage detection arrangements. 7. Review of engine performance records, lube oil analysis reports, and maintenance logs. 8. Crankshaft deflection readings to assess main bearing alignment and wear. 9. If opened for survey, inspection of main and crankpin bearings, cylinder liners, and piston crowns for wear and damage. 10. Verification of exhaust gas system integrity, including insulation and expansion bellows.
Estimated lifetime: 80,000 - 120,000 hours (before major life-extending overhaul, with regular maintenance)
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