18W46DF

Common issues

• Corrosion on exhaust valve stems
• Fuel system leaks due to worn or damaged seals
• Cylinder liner wear due to inadequate lubrication
• Scavenge air system issues causing low compression
• Dual-fuel system malfunctions resulting in reduced power output
• Lube oil system contamination from fuel or water ingress
• Cooling system leaks or blockages causing overheating

Inspection checklist

• Exhaust valve condition and clearance
• Fuel system leak checks and filter inspections
• Cylinder liner and piston condition
• Scavenge air system filter and valve checks
• Dual-fuel system component inspections
• Lube oil system filter and cooler checks
• Cooling system leak checks and heat exchanger inspections
• Crankcase and camshaft condition
• Turbocharger condition and vibration checks

Service intervals

Typical wear limits

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

Critical spares

• Exhaust valves and seats
• Fuel injectors and nozzles
• Cylinder liners and pistons
• Scavenge air system filters and valves
• Dual-fuel system components
• Lube oil system filters and coolers
• Cooling system heat exchangers and pumps

Safety

• Risk of explosion from fuel or gas leaks
• Risk of injury from moving parts or hot surfaces
• Risk of fire from electrical or hot surface ignition
• Risk of asphyxiation from inadequate ventilation

Class survey

Class surveyors typically check for compliance with classification society rules and regulations, including verification of maintenance records, inspection of critical components, and testing of safety systems.