12V M46DF
The Caterpillar MaK 12V M46DF is a 12‑cylinder, four‑stroke dual‑fuel main engine delivering up to 13 200 kW at 500 rpm, capable of running on HFO/MDO/MGO or LNG with low methane slip and IMO Tier II/III emissions compliance.
Engine Specifications
Other Cylinder Configurations 35
Components & Design
Component data being added…
Technical Data
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Common failures & inspection points
Verify functional relief valve systems on fuel gas manifolds and exhaust; check valve set pressure calibration annually
Inspect crankshaft bearing thermoelectric voltage via Caterpillar Bearing Condition Monitoring System; examine bearing shells for lead precipitation and surface wear patterns
Measure cylinder liner wear with inside micrometer; inspect piston ring grooves for cracks; perform borescope inspection of turbocharger turbine for blade erosion or damage
Test LNG regulator pressure response and heater thermostat setpoint; inspect heat exchanger for blockages; verify glycol system circulation and temperature control
Type-general inspection and maintenance points for this equipment category — not model-specific.
Suppliers & Spare Parts
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Maritime Network →Manuals
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operating
MaK M43C Operating ManualCaterpillar Marine / MaK
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maintenance
MaK M43C Maintenance ManualCaterpillar Marine / MaK
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spare_parts
MaK M43C Spare Parts CatalogueCaterpillar Marine / MaK