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The WEICHAI WP12 Oil Pan Assembly (OE No. 612630010126) is a precision-engineered stamped steel or cast aluminum component that serves as the reservoir for engine lubricating oil in WP12 heavy-duty diesel engines. As genuine WEICHAI Engine Parts, this oil pan assembly is manufactured to strict OEM standards for exceptional sealing and durability across all WP12 variants from 336 HP to 550 HP. The WEICHAI WP12 Oil Pan Assembly is engineered with a stamped steel structure, special marine flat oil pan design, and overall stamping with ribs to enhance strength and prevent leakage.
The WEICHAI WP12 Oil Pan Assembly (OE No. 612630010126) is a stamped steel reservoir mounted at the bottom of the engine block that collects, stores, and cools engine lubricating oil. It serves as the sump for the WP12 engine’s lubrication system, holding the oil supply that circulates through the engine to lubricate moving parts, reduce friction, dissipate heat, and carry away contaminants [0†L41-L43].
The WEICHAI WP12 Oil Pan Assembly features a robust stamped steel construction with a one-piece overall stamping design that eliminates weld lines on the surface. This manufacturing method, combined with strategically arranged ribs, significantly improves the structural strength of the oil pan and prevents leakage failure, enhancing overall reliability [2†L6-L9].
The WEICHAI WP12 Oil Pan Assembly incorporates a special flat oil pan design for marine applications, demonstrating its adaptability to various operational environments. The assembly includes the oil pan body, oil drain plug, gasket sealing surface, and mounting bolt holes. The oil pan’s internal baffles help control oil movement during vehicle acceleration, deceleration, and cornering, ensuring consistent oil pickup by the oil pump strainer [2†L4-L9].
Applications for the WEICHAI WP12 Oil Pan Assembly include Shacman Delong X3000, M3000, and F3000 series trucks, Sinotruk HOWO vehicles, Beiben trucks, JAC trucks, CAMC vehicles, Yutong and Kinglong buses, SDLG wheel loaders, XCMG equipment, marine WP12C engines, and stationary generator sets. The oil pan is compatible with WP12 power outputs from 336 HP to 550 HP across Euro III, Euro IV, Euro V, and China VI emission standards [6†L6-L8][0†L41-L43].
The WP12 engine platform has a displacement of 11.596 L, bore of 126 mm, and stroke of 155 mm, with four valves per cylinder and a turbocharged intercooled architecture. The oil pan assembly is an integral part of the engine’s reliability, which has been proven through over 45,000 hours of cumulative bench testing and over 50 million kilometers of whole vehicle road testing [2†L10-L11].
| NO. | Part NO | Description |
|---|---|---|
| 1 | 612630010126 | Oil Pan Assembly (WP12 Euro III, Stamped Steel) [7†L2-L4] |
| 2 | 1009470896 | Oil Pan Gasket (Multi-layer composite, -40°C to +200°C) [11†L11-L22] |
| 3 | 612600010635 | Oil Pan Gasket (WP12, sealing ring service part) [2†L12-L17] |
| 4 | 614150004 | Oil Pan Seal (WD615/WD618/WD12/WP10/WP12) [12†L6-L10] |
| 5 | 612600010647 | Oil Pan Bolt / Pipe Clamp (Mounting hardware) [3†L4-L5] |
| 6 | 90011400039 | Oil Drain Plug Screw (Magnetic, service replacement) [6†L15-L17] |
| 7 | 612600010107 | Oil Pump O-Ring / Seal Ring (WP12) [1†L4-L6] |
| 8 | 612600010638 | Oil Pan Rubber Pipe Clip (Hose mounting) [3†L24-L26] |
The table above lists common service parts for the WEICHAI WP12 Oil Pan Assembly. The oil pan assembly (612630010126) is manufactured with a stamped steel structure featuring overall stamping and strategically arranged ribs to enhance strength and prevent leakage [2†L6-L9]. The oil pan gasket (1009470896) features a multi-layer composite structure with operating temperature range of -40°C to +200°C and has passed 1000-hour bench durability testing [11†L16-L22].
Our WEICHAI WP12 Oil Pan Assembly is manufactured with an overall stamping design that eliminates weld lines on the surface, significantly reducing the risk of oil leakage. Strategically arranged ribs are incorporated into the design to improve structural strength, providing superior durability in the most demanding operating conditions [2†L6-L9].
The WEICHAI WP12 Oil Pan Assembly features a special flat oil pan design specifically developed for marine applications, demonstrating its versatility across different operating environments. The robust construction ensures reliable performance in marine, off-highway, and heavy-duty truck applications [2†L4-L9].
The WEICHAI WP12 Oil Pan Assembly is complemented by a multi-layer composite gasket (1009470896) that utilizes fiber-reinforced rubber + metal skeleton + special coating technology. The gasket operates in temperatures from -40°C to +200°C, maintains 98.5% sealing pressure stability, and withstands chemical erosion from various oil additives [11†L13-L22].
No modifications required for WP12 engines in Shacman Delong X3000/M3000/F3000, Sinotruk HOWO, Beiben, JAC, CAMC, Yutong, Kinglong, SDLG, XCMG, marine, and generator applications. Available for Euro III, Euro IV/V, and China VI engine variants. The oil pan fits all WP12 power outputs from 336 HP to 550 HP [6†L6-L8].
Each WEICHAI WP12 Oil Pan Assembly undergoes rigorous quality control including dimensional inspection, leakage testing, material verification, and structural integrity validation. IATF 16949 certified quality with full traceability. The WP12 engine platform has undergone over 45,000 hours of cumulative bench testing and over 50 million kilometers of road testing.
Worldwide shipping from regional warehouses. Free oil pan installation torque charts, sealant application procedures, and troubleshooting guides provided with each order. Volume discounts available for fleet customers and engine rebuilders. The oil pan must be installed within 5 minutes after sealant application for optimal sealing [4†L25-L26].
Unlike aftermarket oil pans that use inferior materials and lack proper sealing surfaces, our genuine WEICHAI WP12 Oil Pan Assembly is manufactured to original equipment specifications with documented quality control. The overall stamping design eliminates weld lines, a common failure point on lower-quality pans. The strategically arranged ribs increase structural rigidity, preventing flexing and oil pan deformation under extreme operating conditions. This design ensures consistent sealing performance throughout the service life of the engine [2†L6-L9].
The WEICHAI WP12 Oil Pan Assembly is designed to work with the WP12 engine’s advanced lubrication system. The oil pan’s internal geometry ensures consistent oil supply to the oil pump strainer even during high-speed cornering, steep inclines, or heavy braking. The special flat oil pan design for marine applications demonstrates the engineering versatility of this component, making it suitable for everything from long-haul trucks to marine propulsion systems [2†L4-L9].
Technical support includes oil pan installation procedures: drain engine oil, remove old oil pan, clean sealing surfaces thoroughly with solvent and scraper, remove all old gasket material, apply silicone sealant to the clean sealing surfaces (bead diameter approximately 3mm), install the oil pan within 5 minutes of sealant application, torque bolts in a diagonal sequence to 15 N·m, refill with recommended engine oil, and run engine to check for leaks [4†L25-L26][6†L18-L21]. Troubleshooting guides for symptoms like oil leaks (failed gasket or warped pan), low oil pressure (pan damage or pickup tube obstruction), and oil contamination (debris in pan) are provided.
For fleets, sample testing is available. Order one WEICHAI WP12 Oil Pan Assembly for trial; volume pricing applies. Many customers report over 500,000 km trouble-free oil pan operation after replacing corroded or damaged original pans with our genuine components. We provide cross-reference support for part number verification—please provide your engine serial number for accurate matching. We stock both standard oil pans for highway applications and marine variants with special flat pan design.
Also monitor the engine’s oil pressure gauge and warning light. If the oil pressure drops below normal operating range (350-500 kPa at operating RPM), check the WEICHAI WP12 Oil Pan Assembly for damage that may be restricting the oil pickup tube. A dented oil pan can push the pickup tube against the pan bottom, severely restricting oil flow. If the oil warning light illuminates, stop the engine immediately—continued operation can cause catastrophic bearing failure.
For severe-duty applications (mining, construction, heavy haul, marine), reduce oil pan inspection intervals to every 25,000 km (15,000 miles) or 250 operating hours. High ambient temperatures, vibration, and road debris accelerate oil pan damage and gasket degradation. Marine applications require additional corrosion checks—saltwater environments can accelerate corrosion of the stamped steel oil pan. Consider upgrading to a corrosion-resistant coated oil pan for marine applications.
When installing a new WEICHAI WP12 Oil Pan Assembly, ensure that all mounting surfaces on the engine block are perfectly clean and free of old gasket material, corrosion, and debris. Use a plastic scraper (not metal) to avoid scratching the sealing surface. Align the oil pan with the locating dowel pins before tightening bolts. Tighten all bolts gradually in a diagonal sequence to 15 N·m. After installation, fill with the recommended engine oil (API CK-4 or CJ-4, 15W-40 for most applications), run the engine, and inspect for leaks.
Maintain a logbook of all lubrication system maintenance: dates of oil pan inspections, gasket replacement intervals, bolt torque verification readings, oil analysis results, and any abnormal findings. For fleet operators, tracking oil consumption trends is a powerful predictive maintenance tool—a gradual increase in oil consumption often indicates a developing oil pan leak or other lubrication system issue, providing ample warning before complete failure occurs. Regular oil pan inspection and maintenance ensure the WP12 engine continues to deliver reliable, leak-free operation throughout its service life.
In summary, the WEICHAI WP12 Oil Pan Assembly features one-piece stamped steel construction with overall stamping and rib reinforcement, special flat oil pan design for marine applications, multi-layer composite gasket technology (-40°C to +200°C operating range), and direct fitment for all WP12 applications. Whether you are rebuilding a Shacman X3000, Sinotruk HOWO, Beiben truck, Yutong bus, SDLG wheel loader, marine vessel, or generator set, choosing a genuine oil pan assembly directly impacts engine lubrication reliability, oil leak prevention, and overall engine durability.
For workshops performing in-frame overhauls, we recommend ordering the WEICHAI WP12 Oil Pan Assembly as a complete kit including the oil pan (612630010126), oil pan gasket (1009470896), oil drain plug (90011400039), and oil pan bolt set (612600010647). This approach eliminates hidden failures and gives your customer a worry-free warranty period. All oil pans are pre-inspected for structural integrity, sealing surface flatness, and dimensional accuracy before shipment. The multi-layer composite gasket has passed 1000-hour bench durability testing with 98.5% sealing pressure stability [11†L16-L17].
Our inventory includes both standard stamped steel oil pans for highway truck applications and marine variants with special flat pan design for saltwater environments. The standard WEICHAI WP12 Oil Pan Assembly provides excellent service life for long-haul trucking, while marine variants feature additional corrosion-resistant coatings for saltwater resistance. We provide cross-reference support for part number verification—please provide your engine serial number for accurate matching. We stock complete oil pan assemblies, individual gaskets, drain plugs, bolt sets, and sealing hardware.
We provide after-sales documentation including oil pan dimensional inspection reports, material certificates (stamped steel composition), gasket performance test certifications, installation torque specifications (15 N·m for pan bolts, 30 N·m for drain plug), and diagnostic trouble code (DTC) guides for lubrication system-related faults upon request. Every WEICHAI WP12 Oil Pan Assembly component is packaged in protective foam-lined boxes to prevent damage during shipping. Bulk orders receive custom palletizing and export documentation assistance. Express shipping available for urgent repairs—most orders dispatched within 24 hours.
All specifications based on original WEICHAI WP12 engine data. Cross-check part numbers with engine serial number and vehicle application. The WEICHAI WP12 Oil Pan Assembly includes OEM references 612630010126 (stamped steel oil pan), 1009470896 (multi-layer composite gasket, -40°C to +200°C), 612600010635 (gasket), 614150004 (oil pan seal), 612600010647 (bolt set), and 90011400039 (drain plug). Always torque oil pan bolts to 15 N·m in a diagonal sequence, use new gasket at every service, torque drain plug to 30 N·m, and install oil pan within 5 minutes of sealant application if using silicone sealant [4†L25-L26][2†L6-L9][11†L13-L22].
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