WinGD X62-1.2 Two-Stroke Engine

Common issues

• Fuel injection valve dripping or fouling causing cylinder liner scuffing or exhaust temperature deviation between units
• Exhaust valve burning or seat wear from sustained high thermal loading
• Piston ring and liner scuffing, particularly after periods of slow steaming or low-load operation
• Turbocharger fouling on the compressor or turbine side, reducing scavenge air pressure
• Crosshead bearing wear or white-metal damage if lubrication or alignment drifts out of tolerance
• Scavenge air cooler fouling, reducing charge air density and engine performance
• Common-rail fuel or servo oil system leaks affecting injection timing and pressure control
• Cylinder lubrication feed rate mismatched to load, causing under- or over-lubrication

Inspection checklist

• Review indicator/PMI diagrams for cylinder-to-cylinder pressure balance
• Check exhaust gas temperature spread between cylinders against baseline
• Inspect fuel injection valves for dripping and spray pattern at scheduled intervals
• Check crosshead and main bearing clearances by bridge gauge measurement
• Borescope or visual inspection of piston crown, rings and liner through the scavenge ports
• Inspect turbocharger blading, bearings and general cleanliness
• Verify cylinder lubrication feed rate and timing against current load and fuel sulphur content
• Check scavenge air cooler differential pressure and condensate drains
• Inspect exhaust valve seat and spindle condition at overhaul
• Confirm crankcase oil mist detector alarm function

Service intervals

Typical wear limits

Ranges are typical for this design class. Always confirm against the manufacturer documentation for your serial number.

Critical spares

• Fuel injection valve (complete unit)
• Exhaust valve spindle and seat
• Piston ring set (per cylinder)
• Cylinder liner
• Crosshead bearing shells
• Turbocharger nozzle ring and bearing set
• Starting air valve

Safety

• High-pressure common-rail fuel system - never work on rail or injection lines while pressurised
• Crankcase explosion risk after overheating events - oil mist detector alarms must never be bypassed
• Hot exhaust and turbocharger surfaces - check lagging integrity regularly
• Starting air system stored energy - isolate and vent before opening the starting air manifold
• Scavenge space fire risk from oil accumulation, especially after prolonged low-load running

Class survey

Normally enrolled in Continuous Survey Machinery (CSM) or an approved condition-based scheme; surveyors expect running-hours logs, overhaul records for crosshead/main bearings and turbochargers, and confirmation that crankcase explosion relief doors and oil mist detection are tested and functional.