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WinGD

7X52DF-2.0

WinGD X52 / X52DF two-stroke marine diesel/dual-fuel — Marinediesel, Bohrung 520 x Hub 2315 (standard X52/X52DF), 2045 (X52-S2.0 / X52DF-S2.0) mm, 79-105 rpm (standard), 85-120 rpm (S2.0 variants), 80-120 rpm (X52-S2.0) rpm, 5100-14480 kW (5-8 cyl, 79-105 rpm for 2315mm stroke); 4425-12000 kW (X52DF-S2.0, 5-8 cyl, 85-120 rpm); 4550-15280 kW (X52-S2.0, 5-8 cyl, 80-120 rpm). Brennstoff: Diesel/HFO (X52), LNG/Gas (X52DF), Ammonia/Diesel (X52DF-A), Methanol capable (future variants). Status: In production (X52DF-A, X52DF-S2.0, X52-S2.0); Legacy X52DF-1.x removed from portfolio 2024. Verifiziert, Datenblatt verlinkt.

11900.0 kW
Power

Engine Specifications

7
Cylinders
520 mm
Bore
2315 mm
Stroke

Components & Design

Component data being added…

Technical Data

Stroke/Bore Ratio 4.45 (2315mm stroke), 3.93 (2045mm stroke)
Mean Effective Pressure (MEP) 21 bar (X52), 17.3 bar (X52DF)
BSFC X52 (g/kWh) 169.8 g/kWh at MCR 105 rpm (Tier II/III), 170.8 g/kWh low-load tuning
BSFC X52-S2.0 (g/kWh) 154.2-164.8 g/kWh diesel mode, up to 5 g/kWh reduction vs standard
BSFC X52DF-S2.0 (g/kWh) 140.1 g/kWh gas mode + 1.5 pilot, 181.4 g/kWh diesel mode
BSGC X52DF-A-1.0 (g/kWh) 371.5 g/kWh gas mode ammonia, 170.8 g/kWh diesel mode
Power per cylinder 1810 kW/cyl @ 105 rpm (X52), 1490 kW/cyl @ 105 rpm (X52DF), 1500 kW/cyl @ 120 rpm (X52DF-S2.0), 1910 kW/cyl @ 120 rpm (X52-S2.0)
Emissions Compliance IMO Tier II/III (SCR), iSCR integrated option available
Gas system type (DF) Low-pressure gas injection with hydraulic pilot fuel injection
configuration inline
rpm 104
fuel type LNG/MGO (dual-fuel 2.0)
technology X-DF 2.0 Low-Pressure Dual-Fuel
displacement l per cyl 491.6

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Common failures & inspection points

Gas Admission Valve (GAV) stroke sensor unreliability at sea causing unplanned diesel mode shutdown

Visual inspection of GAV sensor wiring, sensor response test at dock and sea trial, check sensor connector corrosion

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Fuel gas supply pressure fluctuations under heavy sea conditions from ship-side LNG system causing engine speed oscillations

Pressure relief valve setting verification, fuel supply isolation valve function check, regulator response test under load variation

wingd.com/media/3jannogh/service-ex...
Scavenge air cooler type changes and turbocharger allocation revisions across X-engine platform requiring careful commissioning verification

Cross-check installed turbocharger serial number against commissioning document, scavenge cooler type plate vs contract specifications

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Oil starvation risk on turbocharger bearing during engine startup and low-pressure transients common in all two-stroke diesels

Check lube oil supply pressure before start, inspect turbo bearing condition at overhaul, verify pre-lubrication startup sequence in manual

www.machinery lubrication.com/Read/...

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

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Equipment Model #67377 · ✓ still in production