Weichai
Weichai 12M55D2500E311
Weichai 12M55D2500E311. Source: 发动机数据单-12M55-6003_12M55D2500E311_NonRad无散热器_Datasheet_26-03-04.pdf, p.1. Gross engine mechanical PRP 2200 kW / ESP 2500 kW at 1800 rpm. Net power is configuration-dependent and separate from gross mechanical output; no electrical genset output inferred. Emissions statement as printed: Unregulated; no additional certification inferred. Production status is unknown; discontinued is the user-authorized catalogue classification, not manufacturer-confirmed cessation. No production-end year asserted. Physical specifications added from manufacturer datasheets, 2026-10-21: compression ratio 16.5:1; dry engine weight 9553 kg without radiator and radiator pipes; overall dimensions without radiator (L × W × H) 2859 × 1556 × 2616 mm. Sources: 发动机数据单-12M55-6003_12M55D2500E311_NonRad无散热器_Datasheet_26-03-04.pdf (physical data on pp.1–2). Existing populated specification fields were not overwritten. Weight is dry engine weight, not genset shipping weight.
Need parts or a replacement for 12M55D2500E311?
Scan QRHide QR
General WhatsApp chatScan with your phone. Add the model and your request in chat.Haifeng sales team- Supporting documents
- 1 document · 1 datasheet
- Last updated
- 2026-10-21
- Package route
- diesel generator sets
- Mechanical Output
- 2,500 kW
- Cylinders
- V12
- Displacement
- 65.65 L
- Rated Speed
- 1,800 RPM
Power Ratings
kWm = mechanical shaft power · kWe = electrical output · kVA = kWe ÷ 0.8 pf
60 Hz1800 RPM
| kWm | kWe | kVA | |
|---|---|---|---|
| Prime Power | 2200 | — | — |
| Standby Power | 2500 | — | — |
Estimated rating: 2250 kWe (2500 kW × 0.90) · 60 Hz · standby
Estimated rating: 1980 kWe (2200 kW × 0.90) · 60 Hz · prime
Planning estimate, not a manufacturer generator rating. Confirm the alternator, engine speed and operating conditions.
Weichai 12M55D2500E311 overhaul & repair parts
Need help identifying a part for your 12M55D2500E311?
Share your nameplate, parts list and destination for a quote.
Identify my part on WhatsAppAvailability and earliest dispatch confirmed for your enquiry.
Opens WhatsApp. Attach photos in the chat.
What to send for a fitment check
- Take a clear photo of the engine nameplate.
- Tell us what needs repair or replacement.
- Send both in WhatsApp to start a fitment check.
Start with engine identification
We do not have a reviewed public parts preview for this model yet. Send the engine details and tell us what needs repair.
Illustrations only — not a model-specific kit or stock confirmation.
View 12M55D2500E311 spec image
Weichai 12M55D2500E311 generator set context
The Weichai 12M55D2500E311 is listed here as a diesel generator-drive engine for 60 Hz generator sets, with a headline 2,500 kW / standby rating. Use this page to compare the published engine output, electrical kWe/kVA ratings, emissions level, datasheet availability, and neighboring models before specifying an alternator, controller, enclosure, voltage, and compliance package.
Model name formats
Technical Specifications
| Brand | Weichai |
| Model | 12M55D2500E311 |
| Configuration | V12 |
| Cylinders | 12 |
| Displacement | 65.65 L |
| Compression Ratio | 16.5:1 |
| Dry Weight | 9553 kg |
| Dimensions (L×W×H) | 2859 × 1556 × 2616 mm |
| Fuel Type | Diesel |
| Ignition Type | Compression Ignition |
| Cooling Method | Liquid-Cooled |
| Emissions Standard | Unregulated |
Frequently asked questions
Does the 12M55D2500E311 run at 50 Hz or 60 Hz?
The Weichai 12M55D2500E311 is rated for 60 Hz (1,800 rpm).
What fuel does the Weichai 12M55D2500E311 use?
The Weichai 12M55D2500E311 is a diesel generator-set engine.
What is the displacement and cylinder configuration of the 12M55D2500E311?
The Weichai 12M55D2500E311 is a V12 (12-cylinder) engine with a displacement of 65.65 L.
Is the 12M55D2500E311 still in production?
No — the Weichai 12M55D2500E311 is discontinued. Its specifications and datasheets remain archived here for reference.
Are reference documents available for the 12M55D2500E311?
This page links reference documents for the Weichai 12M55D2500E311. Check each document's title, model coverage, revision and rating conditions before using it for selection.