Weichai Baudouin 12M33 Piston Assembly – Product Details
Product Overview
Weichai Baudouin 12M33 Piston Assembly (OEM Part No.: 1000443147 / 1001781132) is a genuine OEM heavy‑duty piston kit, precision‑engineered exclusively for
Weichai Baudouin 12M33 series V‑12 heavy‑duty diesel engines (39.2L displacement, 150mm bore × 185mm stroke). As a core reciprocating component, it converts combustion pressure into rotational power, delivering exceptional strength, wear resistance, and thermal stability for marine propulsion, generator sets, and industrial power applications.
Basic Specifications
| Item |
Details |
| OEM Part Numbers |
1000443147, 1001781132 (genuine assembly) |
| Brand |
Weichai Baudouin (Weichai Group) |
| Applicable Engine |
Weichai Baudouin 12M33 series (V‑12, 4‑stroke, 39.2L) |
| Bore × Stroke |
150 mm × 185 mm |
| Compression Ratio |
15:1 (diesel) |
| Piston Material |
High‑strength eutectic aluminum‑silicon alloy (hypereutectic Al‑Si) |
| Piston Crown |
Reinforced combustion bowl, heat‑resistant anodized coating |
| Piston Skirt |
Graphite‑coated for low friction & anti‑scuffing |
| Piston Pin |
Forged alloy steel, full‑floating design |
| Ring Set |
3‑ring configuration (2 compression + 1 oil control) |
| Ring Material |
High‑carbon steel with chrome/plasma coating |
| Cooling System |
Internal oil cooling gallery (jet‑cooled) |
| Net Weight |
Approx. 8.5 kg (complete assembly) |
| Condition |
New, original genuine assembly |
| Design Life |
≥ 20,000 operating hours |
| Fit Type |
Direct OEM replacement, zero‑clearance fit |
Key Features & Advantages
- High‑Strength Aluminum‑Silicon Construction Hypereutectic Al‑Si alloy delivers exceptional high‑temperature strength, low thermal expansion, and excellent wear resistance, maintaining dimensional stability under extreme combustion loads.
- Optimized Combustion Bowl Design Precision‑machined crown with a deep, turbulence‑enhanced combustion bowl promotes complete fuel mixing and combustion, improving power output and reducing emissions.
- Advanced Thermal Management Internal oil cooling gallery with targeted jet cooling efficiently dissipates crown heat, preventing thermal fatigue and extending piston life in continuous heavy‑duty operation.
- Low‑Friction Skirt & Ring System Graphite‑coated skirt minimizes cylinder wall friction and scuffing; premium coated piston rings ensure optimal sealing, oil control, and reduced blow‑by.
- Full‑Floating Piston Pin Forged steel full‑floating pin with precision pin bushings distributes load evenly, reducing pin wear and enabling smooth reciprocation under high loads.
- Perfect OEM Compatibility CNC‑machined to exact factory tolerances for direct bolt‑on installation, matching 12M33 engine’s connecting rod, cylinder liner, and crankshaft specifications.
- Corrosion & Fatigue Resistance Anodized crown and surface‑treated components resist combustion corrosion, oxidation, and high‑cycle fatigue, ideal for marine saltwater and harsh industrial environments.
Application Scope
- Application:Provides piston in various 6M26, 6M33, 12M33,12M55,16M33,16M55 series engines
Packaging & Supply
- Packaging: Anti‑corrosion, shock‑proof export carton with individual piston assembly protection
- MOQ: 1 piece
- Shipping Ports: Qingdao, China
- Delivery: Sea freight, air freight, express courier
- Payment Terms: T/T, L/C (negotiable)
- Warranty Time: 12 month
Installation & Maintenance Notes
- Install only by certified technicians following Weichai Baudouin official service manuals.
- Use genuine piston rings, pin bushings, and lubricants for assembly to ensure performance.
- Lubricate piston skirt, rings, and pin thoroughly before installation to prevent dry‑start scuffing.
- Inspect piston crown, skirt, and rings for wear, cracks, or carbon deposits during overhaul; replace if damage is detected.
- Maintain proper engine oil pressure and quality to ensure effective piston cooling and lubrication.
- Replace piston assembly in complete sets (all 12 cylinders) for uniform engine performance.
Why Choose Genuine Weichai Baudouin 12M33 Piston?
- OEM‑Grade Precision: Guaranteed dimensional accuracy and performance matching factory standards.
- Extreme Durability: Designed for 20,000+ hours of heavy‑duty operation with minimal maintenance.
- Optimal Thermal Performance: Advanced cooling and material design resist heat fatigue and wear.
- Perfect System Fit: Direct compatibility with 12M33 engine’s reciprocating assembly.
- Global Support: Backed by Weichai’s worldwide parts distribution and service network.
Engine parts
