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Bergen Engines

C25:33L8

The Bergen C25:33L8 is an 8‑cylinder, medium‑speed (1000 rpm) 4‑stroke diesel engine delivering up to 3 MW, available in diesel, heavy fuel oil and dual‑fuel configurations with IMO Tier II compliance.

3000.0 kW
Power

Engine Specifications

8
Cylinders
250 mm
Bore
330 mm
Stroke
3,000 kW
MCR Power
1000.0 rpm
MCR RPM
4-stroke
Stroke Type
Family: Bergen Engines Bergen B32:40 · Tier: IMO Tier II · Fuel: HFO, MDO, LNG

Inspector Detail

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Common issues

  • Turbocharger fouling or wear affecting boost pressure and exhaust temperature spread
  • Fuel injection equipment wear leading to unbalanced cylinder loads
  • Cylinder liner and piston ring wear increasing lube oil consumption
  • Charge air cooler fouling reducing charge air density
  • Governor/speed control drift affecting load sharing on multi-engine installations
  • Exhaust valve seat wear or burning
  • Camshaft/tappet wear on high-hour units

Inspection checklist

  • Exhaust temperature deviation check across cylinders
  • Turbocharger condition check - fouling, bearing play, surge history
  • Crankcase borescope inspection at scheduled interval
  • Lube oil analysis - wear metals, TBN, contamination
  • Fuel injection equipment condition check
  • Valve clearance check and adjustment
  • Cooling water/charge air pressure and temperature trend review
  • Governor and overspeed trip function test
  • Vibration monitoring/analysis

Service intervals

Lube oil analysis 500-1,000 running hours
Valve clearance adjustment typically every 2,000-4,000 hours per manufacturer's manual
Fuel injector service typically 6,000-10,000 hours, condition-based
Turbocharger overhaul typically 12,000-20,000 hours or per turbocharger maker's interval
Major overhaul (piston/liner) typically 16,000-24,000 running hours, condition and fuel-quality dependent

Typical wear limits

Cylinder liner wear bauart-typical renewal once diametral wear exceeds roughly 0.3-0.4% of the 250 mm bore - confirm the exact figure against the Bergen instruction manual for this model
Main/big-end bearing clearance manufacturer-specific; renew once clearance trends beyond the manufacturer's stated limit rather than continuing to run
Piston ring gap typically in the low single-digit mm range for this bore class - confirm against the engine's own manual before ordering rings

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

Critical spares

  • Piston with rings, per cylinder
  • Cylinder liner
  • Fuel injector/injection valve
  • Main and big-end bearing shells
  • Turbocharger cartridge/bearing set
  • Charge air cooler element

Safety

  • Crankcase explosion risk - respect interlocks and the cooling-off period before opening after any knock/overheat alarm
  • High-pressure fuel system injury hazard
  • Hot exhaust and turbocharger surfaces
  • Heavy component handling during overhaul
  • Dual-fuel variants, if fitted: gas leak/explosion risk requiring gas detection checks

Class survey

Main or auxiliary engines of this size are normally under Continuous Survey Machinery (CSM) or equivalent, with IMO Tier II compliance records, crankcase inspection logs, and bearing clearance history expected at survey. Confirm the specific notation applicable to the vessel and whether the engine is on CSM or a fixed periodical survey basis.

Estimated lifetime: Medium-speed 4-stroke engines of this bore class (250 mm) are typically designed for 100,000+ hours to major overhaul cycles over the vessel's life with proper maintenance, though individual wear parts are renewed on shorter condition-based cycles - confirm against Bergen Engines' design life documentation for the C25:33L8.

Other Cylinder Configurations 6

B32:40L6
6 cyl · 3,480 kW
C25:33L6
6 cyl · 2,250 kW
B32:40L8
8 cyl · 4,640 kW
C25:33L9
9 cyl · 3,375 kW
B32:40V12
12 cyl · 6,960 kW
B32:40V16
16 cyl · 9,280 kW

Components & Design

Component data being added…

Technical Data

BMEP 25 bar @ 750 rpm (Propulsion), 26 bar @ 720 rpm (Genset)
SFOC (100% MCR) 171-177 g/kWh (MDO basis, varies by cylinders)
SFOC (85% MCR) 173-175 g/kWh
Lube Oil Consumption 0.5 g/kWh
Mean Piston Speed 11.2 m/s (@ 750 rpm), 10.8 m/s (@ 720 rpm)
Dry Weight L6P 42,400 kg
Dry Weight L8P 53,500 kg
Dry Weight L9P 56,400 kg
Dry Weight V12P 71,867 kg
Genset Weight L6A 48,300 kg (engine only)
Genset Weight L8A 60,600 kg (engine only)
Genset Weight L9A 62,400 kg (engine only)
Engine Type 4-stroke, turbocharged with 2-stage charge air cooler
Service Intervals Extended up to 25,000 hours
IMO Compliance Tier II (standard), Tier III (with SCR)
Electrical Output L6 50Hz 3,515 kW genset
Electrical Output L8 50Hz 4,690 kW genset
Electrical Output L9 50Hz 5,285 kW genset
Electrical Output V12 60Hz 6,750 kW genset
Electrical Output V12 50Hz 7,050 kW genset
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Common failures & inspection points

Piston rod scoring risk due to heavy scavenge space dirt accumulation
Cylinder liner wear and ovality development requiring periodic measurement via micrometer in port-starboard and forward-aft positions
Turbocharger oil starvation and contamination (>90% of turbo failures) - requires monitoring lube oil quality and pressure
Water or fuel in scavenge space (leak detection through piston inspection at BDC) - indicates potential head gasket or fuel valve seat leakage
Fuel injection system wear requiring maintenance - Bergen standard practice includes complete cylinder head overhaul kits available with 3-piece conrod design

Type-general inspection and maintenance points for this equipment category — not model-specific.

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Equipment Model #38045 · ✓ still in production