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WinGD

8X92DF

Name: WinGD 8X92DF
Brand: WinGD
SKU: OSE-38814

The WinGD 8X92DF is an eight‑cylinder, low‑speed (80 rpm) two‑stroke main engine delivering up to 51 120 kW, capable of running on heavy fuel oil, marine diesel and low‑pressure gas (LNG, methanol or ammonia ready) with Tier III emissions in gas mode.

51120.0 kW

Power

Engine Specifications

Cylinders

920 mm

Bore

3468 mm

Stroke

51,120 kW

MCR Power

80.0 rpm

MCR RPM

2-stroke

Stroke Type

Family: WIN-GD X-DF · Tier: IMO Tier III (gas mode) · Fuel: HFO, VLSFO, MDO, LNG

Inspector Detail

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Common issues

Gas admission or gas injection valve leakage causing gas-mode misfire
Pilot fuel injector wear affecting ignition timing in gas mode
Exhaust valve seat burning or recession from high thermal load
Piston ring/liner scuffing from cylinder lubrication feed rate mismatch
Turbocharger fouling reducing scavenge air pressure
Oil residue build-up in the scavenge space (fire risk)
Fuel/gas changeover transients causing load fluctuation or trip

Inspection checklist

Check gas admission valve tightness and leak-off per maker's gas safety procedure
Inspect scavenge space for oil residue and deposits as a fire-risk indicator
Measure exhaust valve spindle/seat wear via rotation and lift check
Borescope inspection of piston crown, ring land and liner running surface
Check cylinder lubrication feed rate and timing against load
Inspect turbocharger nozzle ring and turbine blades for fouling or erosion
Verify crankcase oil mist detector and relief valve function
Check double-wall gas fuel piping ventilation fan operation and alarms
Review engine control system alarm/event log for gas-mode trips

Service intervals

Piston overhaul (crown/rings/skirt)	typically 16,000-24,000 hours - condition-based per maker's guidance
Cylinder liner inspection	typically every 8,000-12,000 hours
Exhaust valve overhaul	typically 8,000-16,000 hours depending on fuel and load profile
Gas admission valve function test	typically every 4,000-8,000 hours
Turbocharger overhaul	typically 16,000-20,000 hours or condition-based
Scavenge space cleaning/inspection	typically every 2,000-4,000 hours

Typical wear limits

Piston ring gap	typically 0.8-1.6 mm for this bore class - confirm against the engine's own manual
Cylinder liner wear (bore increase)	condition-based, commonly checked against a per-diameter wear-rate limit for 2-stroke liners of this size - confirm against maker's limit table
Exhaust valve seat recession	assessed by valve rotation and seat contact pattern rather than a fixed dimension - follow maker's inspection procedure

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

Critical spares

Piston complete with rings
Cylinder liner
Exhaust valve complete with seat
Gas admission valves
Pilot fuel injectors/injection valves
Turbocharger bearing/cartridge set
Cylinder lubricator elements

Safety

Loss of ventilation on double-wall gas fuel piping is a critical alarm - never bypass
Scavenge space fire risk - oil accumulation must be checked and removed regularly
Crankcase explosion risk - oil mist detector must be tested per schedule
High-pressure gas supply system - purge and inert before hot work nearby
Heavy rotating/reciprocating masses - strict lock-out during turning gear engagement

Class survey

Typically surveyed under Continuous Survey Machinery (CSM) with condition-based interval extension subject to trending of cylinder pressures, exhaust temperature spread and turbocharger performance. Gas fuel installation is additionally subject to IGF Code survey requirements, including verification of gas detection, ventilation and emergency shutdown systems.

Estimated lifetime: Low-speed 2-stroke main engines of this class are typically designed for a service life well beyond 100,000-150,000 running hours with scheduled piston, liner and valve overhauls; overhaul intervals are condition and load-profile dependent - confirm against the maker's maintenance system

Other Cylinder Configurations 33

Components & Design

Alpha Lubricator Control WIN-GD / Hans Jensen Lubricators

WIN-GD Pulse Lubrication System

Pulse lubrication for accurate CLO timing. Feed rate adjustable 0.5-1.0 g/kWh. Lower feed on gas mode.

Lead time: 6 wk

20.0 kg

Common Rail Unit (RT-flex / X-DF) WIN-GD / Winterthur

WIN-GD Common Rail Unit

Rail pressure ~1000 bar (fuel), ~200 bar (servo oil). Monitor rail pressure stability.

Lead time: 16 wk

1800.0 kg

Crankcase Oil Mist Detector GEA / Schaller Automation

GEA Westfalia OMD / Schaller VN215+

Same as diesel — SOLAS mandatory regardless of fuel. Test weekly.

Lead time: 2 wk

8.0 kg

Cylinder Liner WIN-GD

WIN-GD X-DF Cylinder Liner

Gas ports machined into liner — inspect for erosion. Wear rate significantly lower in gas mode.

Lead time: 16 wk

3200.0 kg

Dual-Fuel System (Gas Mode) WIN-GD

WIN-GD X-DF Gas Admission System

Gas admission at 10-16 bar via scavenge ports. Pre-chamber with diesel pilot. Monitor methane slip.

Lead time: 12 wk

350.0 kg

Engine Control Unit (ECU / ECS) WIN-GD / ABB

WIN-GD WiDE Engine Control System

WiDE = Wartsila Intelligent Diesel Engine. Dual-redundant. iCER optimization requires latest firmware.

Lead time: 8 wk

50.0 kg

Exhaust Valve (& Valve Seat) WIN-GD

WIN-GD Exhaust Valve (X-DF)

Gas mode extends valve life significantly (less hot corrosion). Overhaul at 16,000 hrs (gas-only: 24,000 hrs).

Lead time: 10 wk

300.0 kg

FGSS (Fuel Gas Supply System - LNG/Methanol) TGE Marine / Wartsila Gas Solutions

FGSS LNG Supply Module (ME-GI type HP / X-DF type LP)

LP-FGSS for X-DF (6-16 bar). Mandatory gas detection in duct space. Emergency shutdown drill monthly.

Lead time: 26 wk

Fuel Valve (Injector) WIN-GD

WIN-GD X-DF Fuel Valve (diesel + pilot)

Pilot injector critical for gas mode ignition. Inspect pilot nozzle at 4,000 hrs. Main valve at 8,000 hrs.

Lead time: 6 wk

75.0 kg

Governor (Electronic/Woodward) Woodward

Woodward 723PLUS / WIN-GD Integrated Governor

Integrated with WiDE. Gas/diesel mode switching requires governor parameter set change.

Lead time: 4 wk

15.0 kg

Hydraulic Power Supply (HPS) WIN-GD

WIN-GD Flex HPS (Common Rail Servo Oil)

Servo oil system at ~200 bar. Filter changes every 4,000 hrs. Use approved servo oil only.

Lead time: 14 wk

2500.0 kg

Piston Crown WIN-GD

WIN-GD X-DF Piston Crown

Gas mode reduces thermal loading. Inspect at 16,000-24,000 hrs. Extended intervals possible in gas-only service.

Lead time: 14 wk

1700.0 kg

SCR (Selective Catalytic Reduction) HUG Engineering / Yara Marine

WIN-GD SCR Reactor (for diesel mode Tier III)

Only needed for Tier III in diesel mode (gas mode is inherently Tier III). SCR bypass in gas mode.

Lead time: 20 wk

12000.0 kg

Scavenge Air Cooler WIN-GD / Alfa Laval

WIN-GD SAC (Plate/Shell-and-tube)

Cleaner in gas mode — extended cleaning intervals. Monitor charge air temperature after cooler.

Lead time: 14 wk

5000.0 kg

Sensors & Transmitters WIN-GD / Danfoss / ABB

WIN-GD Sensor Suite (pressure, temp, speed, knock)

Knock detection sensors critical for X-DF gas mode — prevents detonation. Calibrate every 4,000 hrs.

Lead time: 2 wk

2.0 kg

Turbocharger Unit (ABB/MHI/Napier) ABB Turbocharging

ABB A265-L Turbocharger

Gas mode significantly reduces fouling. Extended TC overhaul interval to 16,000-24,000 hrs in gas mode.

Lead time: 16 wk

8500.0 kg

Technical Data

Bohrung 920 mm

Hub 3468 mm

Hub/Bohrung-Verhältnis 3.77

MEP R1 (X92-B) 21.0 bar

MEP R1 (X92DF-2.0 Gasmode) 17.3 bar

BSFC R1 (X92-B Standard) 167 g/kWh

BSFC R2 (X92-B Standard) 160 g/kWh

Spezifische Leistung 6450 kW/cylinder (R1)

Typ Viertakt-Langsamläufer, gemeinsame Schiene (Common Rail)

Zündfolge 1-7-4-10-2-8-5-11-3-9-6-12

Thermischer Wirkungsgrad 51-53% (X92DF im Lastbereich 60-90%)

Emissions-Kompliance IMO Tier II (Standard), IMO Tier III (mit SCR)

unified from engine model True

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Common failures & inspection points

WECS-9520 Steuerungssystem-Ausfälle (dokumentierte Mängel in Servoöl-Lecks, Kraftstoff-Lecks, Drossel-Einspritzventile)

Cooling water leakage in cylinders and exhaust valve actuator deficiencies; inspection routine for high-pressure SCR system required

Bearing and piston cooling oil temperature monitoring critical; condensate flow at water separator too high (scavenging cooling system fouling)

Thermal stress cracks in cylinder head (valve bridge): cyclic thermal load at load changes 70-80 RPM; exhaust valve seating surface wear requires sc

Turbocharger oil leakage and leaks; scavenge air cooler fouling (air side: pressure drop, temperature rise; water side scaling)

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

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Equipment Model #38814 · ✓ still in production