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MTU
12V595
The MTU 12V595 is a high‑power‑density V‑12, four‑stroke marine diesel engine featuring two‑stage sequential turbocharging and electronic direct fuel injection.
2220.0 kW
Power
Engine Specifications
12
Cylinders
170 mm
Bore
210 mm
Stroke
4-stroke
Stroke Type
Inspector Detail
▸
Common issues
- Turbocharger bearing wear from sustained high-speed operation across the two-stage turbocharging system
- Injector wear affecting spray pattern and increasing fuel consumption/smoke
- Charge air cooler fouling reducing available power
- Torsional/vibration damper deterioration
- Cylinder liner wear accelerated by high rpm operation
- Coolant system scaling or corrosion in the jacket water and charge air circuits
- Electronic control unit (ECU) sensor faults triggering derates
Inspection checklist
- Check the ECU fault/event log for derates, sensor faults and overspeed events
- Inspect both turbocharger stages for bearing play and fouling
- Check the charge air cooler for fouling and pressure drop
- Verify torsional/vibration damper condition
- Inspect the fuel injection system for leakage and spray pattern
- Check coolant condition and corrosion inhibitor level
- Inspect exhaust valve clearances at scheduled intervals
- Check engine mounts and flexible couplings for wear
- Review oil analysis trend for wear metals
Service intervals
| Lube oil and filter change | typically every 500-1,000 hours, per MTU's oil specification and duty cycle |
| Oil analysis | every 250-500 hours |
| Valve clearance check | typically every 2,000-4,000 hours |
| Turbocharger inspection | typically every 4,000-6,000 hours |
| Injector inspection/exchange | typically 6,000-10,000 hours, condition-based |
| Major overhaul | typically 12,000-20,000 hours depending on duty cycle - confirm against MTU's maintenance schedule for the specific rating |
Typical wear limits
| Piston ring gap (bore-class approximation) | high-speed diesels of this bore size typically run ring gaps on the order of 0.4-0.6 mm - confirm against MTU's manual for the 595 series |
| Cylinder liner wear | condition-based per MTU's manual - high-speed engines of this class typically show measurable wear earlier in hours than medium-speed equivalents; confirm against the maker's specific limits |
Ranges are typical for this design class. Always confirm against the manufacturer documentation for your serial number.
Critical spares
- Fuel injectors/injection system components
- Turbocharger repair kit for both stages
- Charge air cooler gasket/seal kit
- Torsional vibration damper
- Cylinder head gasket set
- Main/big-end bearing shells
- Coolant thermostat/water pump seal kit
Safety
- High-pressure fuel injection system carries a stored-energy hazard
- Hot surfaces on turbochargers, exhaust manifolds and charge air piping
- Rotating flexible coupling/PTO guarding must be in place
- Do not bypass ECU safety shutdowns (overspeed, low oil pressure) without maker authorization
- Coolant system pressure - allow cooling before opening filler caps
Class survey
Engines of this type are typically surveyed under the vessel's machinery survey scheme, with class wanting running-hour logs, oil analysis trend data, and evidence of turbocharger and injector condition monitoring. Governor/overspeed trip tests and vibration damper condition are typically checked at each survey where the engine is on classed main or auxiliary propulsion duty.
Components & Design
Component data being added…
Technical Data
Displacement per cylinder
5951 cc (5.95 L)
Total displacement 16V
95.3 L
Mean Effective Pressure (MEP)
22.2-30.2 bar
Weight-to-Power ratio (12V)
3.0 kg/kW
Weight-to-Power ratio (16V)
2.8 kg/kW
16V595TE70 Rated Power
3600 kW at 1700 rpm
16V595TE90 Rated Power
4319 kW (5793 hp)
12V595TE90 Rated Power
3213 kW (4345 hp)
16V595TE70 Fuel Consumption
919.52 L/h (198 g/kWh at 100% load)
16V595TE70 Weight (dry)
14120 kg
16V595TE90 Weight (dry)
16200 kg
Turbocharger Configuration
2-stage sequential turbocharging with intercooling
Fuel Injection System
1500 bar direct injection with electronic control
Application
Fast ferries, catamarans, hydrofoils, monohulls, yachts, surface effect ships
power kw
2220
rpm
1500
fuel type
MDO
configuration
V
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Common failures & inspection points
Fuel contamination and water infiltration causing 70% of marine diesel fuel system failures
Turbocharger failure from bearing wear, oil contamination, and compressor fouling reducing boost pressure and power output
Piston ring wear and cylinder liner damage from turbo oil seal failures introducing metal particles into combustion chambers
Electronic control unit (ECU) sensor failures triggering protective de-rate strategies limiting engine power
Fuel injector degradation and clogging from contaminated fuel requiring high-precision diagnostic equipment for repair
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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- project_guide
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Equipment Model #123554
· ✓ still in production