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Mitsubishi MET

WB 42WB

Turbocharger · Turbochargers

Technical data from manufacturer or class sources · not yet verified by a person

The Mitsubishi MET‑WB 42WB is a medium‑speed, axial‑flow turbocharger designed for four‑stroke diesel engines up to about 8 MW (≈8000 kW), providing high boost pressure and efficient exhaust gas energy recovery.

Specifications

Technical data.reference — unverified

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Frame Size42WB
Power max (kW)8000
Inspection

Inspector Detail ✓ verified

Common issues

  • Compressor wheel fouling due to poor air filtration
  • Turbine blade erosion from high-temperature exhaust gases
  • Bearing wear and vibration caused by misalignment or imbalance
  • Oil leakage from seals and gaskets
  • Carbon buildup on nozzle rings and turbine blades
  • Inadequate cooling of the turbocharger components
  • Incorrect fuel injection timing and pressure

Inspection checklist

  • Visual inspection of compressor and turbine blades for damage or fouling
  • Check bearing temperatures and vibration levels
  • Inspect oil seals and gaskets for signs of leakage
  • Verify proper alignment and balance of the turbocharger
  • Check compressor inlet and outlet pressures
  • Inspect turbine nozzle rings for carbon buildup
  • Verify proper cooling system operation
  • Check fuel injection system for proper timing and pressure

Service intervals

major_overhaul30000 - 40000 hours
bearing_replacement20000 - 30000 hours
seal_replacement10000 - 20000 hours
compressor_blade_cleaning5000 - 10000 hours

Typical wear limits

compressor_blades10% of blade tip clearance
turbine_blades5% of blade tip clearance
bearings0.1 - 0.2 mm of radial clearance

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

Critical spares

  • Compressor wheel
  • Turbine blades
  • Bearing sets
  • Seal kits
  • Nozzle rings
  • Oil pumps and filters
  • Gaskets and O-rings

Safety

  • High-temperature exhaust gases
  • Rotating machinery hazards
  • Oil leakage and fire risk
  • Electrical shock from faulty wiring or components

Class survey

The class surveyor will typically check the turbocharger's performance, vibration levels, and maintenance records to ensure compliance with regulatory requirements and manufacturer's recommendations.

Estimated lifetime: 50000 - 70000 hours

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