"> WinGD 8X40-B
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WinGD

8X40-B

The WinGD X40‑B is a low‑speed, two‑stroke marine diesel main engine delivering up to 9 440 kW at 146 rpm, distinguished by its WiDE electronic control system and flexible fuel capability (HFO, VLSFO, MDO).

WinGD 8X40-B
9440.0 kW
Power

Engine Specifications

8
Cylinders
400 mm
Bore
1770 mm
Stroke
9,440 kW
MCR Power
146.0 rpm
MCR RPM
2-stroke
Stroke Type
Family: WIN-GD X · Tier: IMO Tier II · Fuel: HFO, VLSFO, MDO

Other Cylinder Configurations 50

5X35
5 cyl · 4,450 kW
5X35-B
5 cyl · 4,700 kW
5X40
5 cyl · 5,600 kW
5X40-B
5 cyl · 5,900 kW
5X52
5 cyl · 9,400 kW
5X52-B
5 cyl · 9,950 kW
5X62
5 cyl · 13,400 kW
5X62-B
5 cyl · 14,150 kW
5X72
5 cyl · 18,300 kW
5X72-B
5 cyl · 19,350 kW
5X82
5 cyl · 24,250 kW
5X82-B
5 cyl · 25,600 kW
5X92
5 cyl · 31,950 kW
5X92-B
5 cyl · 33,700 kW
6X35
6 cyl · 5,340 kW
6X35-B
6 cyl · 5,640 kW
6X40
6 cyl · 6,720 kW
6X40-B
6 cyl · 7,080 kW
6X52
6 cyl · 11,280 kW
6X52-B
6 cyl · 11,940 kW
6X62
6 cyl · 16,080 kW
6X62-B
6 cyl · 16,980 kW
6X72
6 cyl · 21,960 kW
6X72-B
6 cyl · 23,220 kW
6X82
6 cyl · 32,280 kW
6X82-B
6 cyl · 30,720 kW
6X92
6 cyl · 38,340 kW
6X92-B
6 cyl · 40,440 kW
7X35
7 cyl · 6,230 kW
7X35-B
7 cyl · 6,580 kW
7X40
7 cyl · 7,840 kW
7X40-B
7 cyl · 8,260 kW
7X52
7 cyl · 13,160 kW
7X52-B
7 cyl · 13,930 kW
7X62
7 cyl · 18,760 kW
7X62-B
7 cyl · 19,810 kW
7X72
7 cyl · 25,620 kW
7X72-B
7 cyl · 27,090 kW
7X82
7 cyl · 33,950 kW
7X82-B
7 cyl · 35,840 kW
7X92
7 cyl · 44,730 kW
7X92-B
7 cyl · 47,180 kW
8X35
8 cyl · 7,120 kW
8X35-B
8 cyl · 7,520 kW
8X40
8 cyl · 8,960 kW
8X52
8 cyl · 15,040 kW
8X52-B
8 cyl · 15,920 kW
8X62
8 cyl · 21,440 kW
8X62-B
8 cyl · 22,640 kW
8X72
8 cyl · 29,280 kW

Components & Design

Component data being added…

Technical Data

Bore X35-B: 350 mm; X40-B: 400 mm
Stroke X35-B: 1550 mm; X40-B: 1770 mm
Stroke/Bore Ratio 4.43 (both models)
Power Range X35-B: 2,450–6,960 kW; X40-B: 3,250–9,080 kW
RPM Range X35-B: 118–167 rpm; X40-B: 104–146 rpm
Mean Effective Pressure (MEP R1) X35-B: not verifiable; X40-B: 21 bar
SFOC (Specific Fuel Oil Consumption) X35-B: ~175.8 g/kWh; X40-B: ~176.8 g/kWh (Tier II, Vollast)
Fuel Type Marine Diesel (HFO/MDO) - Single-Fuel; X40DF-Variante: LNG Dual-Fuel
Fuel Injection System Electronically Controlled Common Rail mit Zeit-gesteuerte Einspritzung
Emissions Compliance IMO Tier II/Tier III (SCR-Nachrüstung für Tier III)
Production Status Legacy (Produktion beendet, technische Unterstützung aktiv)
unified from engine model True

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Common failures & inspection points

Cylinder liner scuffing: Local welding and wear between piston ring and liner inner surface caused by inadequate lubrication or oil film breakdown

Visual inspection of liner for scratches, micro-welding and discoloration; check local surface roughness; hone liner or replace if necessary

wingd.com/media/odqa15kl/wingd-guid... www.cimac.com/cms/upload/workinggro...
Piston crown and ring groove wear: Surface stress, wear and cracks in piston crown and ring grooves require thickness measurements

Use thickness gauge (e.g. Fischer Dualscope MP0); compare with reference values from OM; inspect piston crown for thermal discoloration, cracks and deposits

wingd.com/media/odqa15kl/wingd-guid...
Fuel pressure anomalies and groove leakage: Excessive/insufficient pressure in common rail system and fuel leakage from injection lines

Check fuel pressure during operation (reference value at R1); monitor fuel return for leaks; observe inspection lines at injectors for leaks

wingd.com/media/ueqnlyk0/om_wingd-x...
Exhaust temperature irregularities with elevated gas concentration in piston underside: Asymmetrical or unexpected exhaust temperatures downstream of individual cyl

Perform continuous exhaust temperature monitoring per cylinder; initiate cylinder head inspections at temperature differences >30°C; check gas concentration in piston

Servo oil system leakage and FLV/fuel line tightness issues: pressure loss in servo hydraulic system and fuel leak at Fuel Line Valves

Monitor servo oil pressure and flow; visually inspect all fuel lines and valve connections and under pressure; monitor sight glasses

wingd.com/service-support/operation...

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

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Equipment Model #38762 · ✓ still in production