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- Wanda Plaza, Jinan, Shandong, China
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The WEICHAI WP12 Oil Pan Group is a premium-grade oil reservoir and sealing assembly engineered specifically for the WP12 diesel engine platform. This complete group securely stores engine oil at the bottom of the crankcase while ensuring proper lubrication circulation, heat dissipation, and contaminant exclusion. Proper oil pan function is essential for engine longevity and performance, and the WEICHAI WP12 Oil Pan Group provides fleet operators and technicians with an OEM-grade solution for maintaining reliable oil containment under all operating conditions. For genuine replacement parts and comprehensive engine service components, always source from verified WEICHAI Engine Parts to guarantee OEM fitment, consistent quality, and long-term reliability.
The WEICHAI WP12 Oil Pan Group is a complete oil reservoir and sealing assembly mounted at the bottom of the engine crankcase, responsible for storing engine oil that lubricates and cools internal moving parts. This assembly consists of the oil pan housing (stamped steel or cast aluminum), the oil pan gasket (rubber or composite sealing ring), the oil drain plug with sealing washer, and all necessary mounting hardware. As the foundation of the WP12 engine’s lubrication system, the oil pan ensures that clean, properly cooled oil is available for circulation to the oil pump, bearings, camshaft, and turbocharger at all times.
The oil pan housing is manufactured from high-strength stamped steel with a corrosion-resistant coating or die-cast aluminum alloy, offering excellent impact resistance and thermal stability. For the WP12 engine, the WEICHAI WP12 Oil Pan Group features internal baffles or stabilizer plates that minimize oil sloshing during vehicle acceleration, braking, and cornering, ensuring that the oil pickup tube remains submerged even on inclined surfaces up to 35°. The pan includes a deep sump design that provides approximately 28-32 liters of oil capacity (depending on configuration), sufficient for extended service intervals and demanding operating conditions.
The WEICHAI WP12 Oil Pan Group is designed for the 11.596-liter inline-six WP12 engine used in heavy trucks (HOWO T7H, SHACMAN Delong F3000, FOTON Auman, Jiefang), construction machinery (loaders, excavators, bulldozers), marine propulsion, and stationary generator sets. The assembly is compatible with all WP12 variants from Euro III through Euro V emission standards, as well as China VI engines. The oil pan is secured to the cylinder block using 16-20 fastening bolts with a multi-layer steel (MLS) or rubber-coated gasket ensuring an oil-tight seal. The gasket is manufactured from high-quality synthetic rubber (EPDM) that withstands temperatures ranging from -40°C to +150°C.
In addition to the basic oil pan housing and gasket, the complete WEICHAI WP12 Oil Pan Group includes the magnetic drain plug with integrated sealing washer, which captures ferrous metal particles from engine wear before they can recirculate through the lubrication system. Some variants also include an oil level sensor port for electronic oil level monitoring (typically located on the side of the pan), dipstick tube mounting boss, and oil cooler return line fittings. Replacement oil pan groups are available as complete assemblies or as individual components, allowing workshops to replace only damaged sections rather than the entire system.
For marine applications, the WEICHAI WP12 Oil Pan Group is supplied with a flat oil pan design featuring overall stamping construction with no weld lines on the surface, formed in one operation to prevent leakage failure and improve reliability. For construction machinery operating in high-vibration environments, the oil pan features reinforced mounting flanges and additional internal support ribs to resist fatigue cracking. For cold-region vehicles, the oil pan may be equipped with a heater pad mounting surface or coolant heating jacket to reduce oil viscosity at startup for easier cold cranking.
Every genuine WEICHAI WP12 Oil Pan Group undergoes 100% dimensional inspection and leak testing. Counterfeit oil pans often use thinner-gauge steel with inconsistent material thickness or inferior gaskets that harden and leak prematurely. Some counterfeit pans lack internal baffles or have incorrect drain plug threads, leading to stripping and oil leaks. Always source from authorized distributors to guarantee proper material composition, precise fitment, and leak-free operation.
| NO. | Part NO | Description |
|---|---|---|
| 1 | 612630010471 | Oil Pan Assembly (Complete, WP12 Standard) |
| 2 | 612630010126 | Oil Pan Assembly (WP12 Euro III, Truck Application) |
| 3 | 612600150347 | Oil Pan Assembly (WP12/WP13, Heavy-Duty Truck) |
| 4 | 612600150382 | Oil Pan Assembly (HOWO Weichai, Pressed Steel) |
| 5 | 612630010065 | Oil Pan Gasket (Rubber/EPDM, WP12) |
| 6 | 614150004 | Oil Pan Gasket (Multi-Loop Rubber Seal, WP12/WD615) |
| 7 | 612600150106 | Gasket / Sealing Washer (Drain Plug Accessory) |
| 8 | 612630010419 | Retainer of Oil Pan / Support Block |
| 9 | 612630010420 | Retainer of Oil Pan / Mounting Bracket |
| 10 | 1411821-00007-001 / 90011400039 | Oil Pan Fixing Screw / Hex Flange Bolt |
| 11 | VG14150004 | Oil Pan Drain Plug (Magnetic, with Sealing Washer) |
| 12 | 612600150390 | Retainer of Oil Pan (WP10/WP12 Cross-Compatible) |
| 13 | 1014400908 | Oil Pan Gasket (Aftermarket Compatible) |
| 14 | 612630110002 | Gasket (Engine Accessory, WP12) |
| 15 | 612600081630 | Pipe Clamp Assembly (For Oil Pan Mounting Accessories) |
Our WEICHAI WP12 Oil Pan Group uses high-grade pressed steel with a corrosion-resistant coating or die-cast aluminum alloy, providing 30% greater impact resistance than standard pans and exceptional durability in harsh operating environments. The one-time stamping construction eliminates weld lines that could become leak paths, ensuring reliable oil containment for the life of the engine.
The oil pan features internal baffles or stabilizer plates that minimize oil sloshing during acceleration, braking, and cornering. This ensures that the oil pickup tube remains submerged even on steep inclines up to 35°, preventing oil starvation under demanding driving conditions. The deep sump design provides sufficient oil capacity for extended service intervals (20,000-50,000 km depending on application).
Our WEICHAI WP12 Oil Pan Group includes a high-quality EPDM synthetic rubber gasket that withstands temperatures from -40°C to +150°C and pressures up to 150 PSI. The multi-loop design conforms seamlessly to irregular engine block surfaces, creating a leak-proof seal that outperforms flat gaskets by approximately 30% in durability tests.
Our oil pans are manufactured using original WP12 engine drawings, ensuring bolt holes align perfectly with the cylinder block and the gasket sealing surface matches factory specifications. No modifications required for installation on HOWO T7H, SHACMAN Delong F3000, FOTON Auman, Jiefang, and other WP12-powered vehicles. The assembly is compatible with all WP12 variants from Euro III through China VI emission standards.
Each WEICHAI WP12 Oil Pan Group includes the magnetic drain plug with sealing washer, all necessary mounting bolts, and the oil pan gasket. No need to source separate hardware or risk using incorrect sealing components that could cause oil leaks and engine damage. The magnetic drain plug captures ferrous metal particles, protecting the oil pump and bearings.
We stock complete oil pan groups and individual components in warehouses across Asia, Europe, and the Americas. Express shipping options minimize downtime for fleet operators. Technical documentation includes torque specifications, gasket installation procedures, and diagnostic guides for oil leak detection.
Unlike generic aftermarket oil pans that use thin-gauge steel prone to denting and corrosion, our WEICHAI WP12 Oil Pan Group is manufactured to original equipment specifications. The pressed steel construction features a minimum thickness of 2.0 mm, with reinforced ribs stamped into the pan floor to resist flexing under oil surge loads. The corrosion-resistant e-coating or zinc-phosphate finish protects against rust from road salt, moisture, and chemical exposure, ensuring a service life exceeding 500,000 km.
Furthermore, our oil pan gaskets are manufactured from high-quality EPDM synthetic rubber with a multi-loop sealing profile. Unlike conventional flat gaskets that require high clamping force to seal, the multi-loop design conforms to irregular engine block surfaces, creating a leak-proof seal with lower bolt torque. The gasket withstands exposure to engine oil, coolant, and combustion byproducts without hardening or cracking, maintaining sealing integrity through thermal cycles. The gasket is approximately 30% more durable than standard rubber seals, with a temperature rating of -40°C to +150°C and pressure rating of 150 PSI.
Technical documentation included with the WEICHAI WP12 Oil Pan Group provides correct bolt torque specifications (oil pan bolts: 10-15 Nm, oil drain plug: 33-45 Nm), gasket installation procedures (clean dry surfaces, no additional sealant required), and a troubleshooting guide for common issues such as oil leaks (replace gasket or check drain plug torque) and oil pressure drop (verify pan is not dented, restricting oil pickup clearance).
For large fleet customers, we offer sample evaluation: order one WEICHAI WP12 Oil Pan Group for trial installation. After validation, volume pricing applies. Many return customers report that our oil pan groups exceed the original equipment service life, with over 600,000 km of leak-free operation, compared to low-cost alternatives that often develop leaks or rust-through within 150,000 km.
Beyond the checklist above, pay attention to any change in oil pressure readings on the dashboard gauge. A sudden drop in oil pressure at idle or under load may indicate a cracked oil pan, damaged gasket, or a loose drain plug causing rapid oil loss. If oil pressure warning light illuminates or gauge reading falls below 200 kPa at idle, stop the engine immediately and investigate. Running an engine with low oil pressure will cause catastrophic bearing damage within minutes.
For engines operating in severe service (construction equipment, mining trucks, off-highway applications), consider more frequent oil pan inspections every 25,000 km. Rocks and debris can impact the pan, causing dents or punctures. For mining applications, consider installing a heavy-duty skid plate or rock guard to protect the oil pan from impact damage. For marine applications, inspect the oil pan annually for saltwater corrosion, paying special attention to the drain plug area and weld seams.
When replacing a damaged oil pan, always install a new gasket and new drain plug sealing washer. Inspect the cylinder block sealing surface for damage or debris before installation. Clean both surfaces with a lint-free cloth and solvent. Apply no additional sealant unless specified — the rubber gasket is designed to seal dry. Install the pan with the bolts hand-tight, then torque in sequence to 10-15 Nm. After filling with oil, run the engine for 5 minutes, then inspect for leaks. Re-torque bolts if seepage is observed (no more than an additional 3 Nm).
Finally, maintain a service log for the WEICHAI WP12 Oil Pan Group recording installation dates, bolt torque values, gasket replacement intervals, and any observed damage or leaks. This data helps predict when components are approaching end of life. For fleet operators, standardized replacement of oil pan gaskets every 200,000 km and complete oil pan assembly inspection every 100,000 km eliminates oil leak-related breakdowns and protects engines from oil starvation.
In summary, the WEICHAI WP12 Oil Pan Group is an essential component for the WP12 engine’s lubrication system. Its robust stamped steel construction, precision-molded rubber gasket, and magnetic drain plug ensure that engine oil remains clean, contained, and available for circulation. Whether you are replacing a corroded oil pan on a HOWO T7H tractor, maintaining a fleet of SHACMAN Delong F3000 dump trucks, or servicing a WP12 marine propulsion engine, using a genuine oil pan group ensures that the engine’s oil reservoir functions as designed, providing the lubrication necessary for long, reliable service.
For workshops performing engine overhauls or oil pump replacement, we recommend ordering the WEICHAI WP12 Oil Pan Group together with a new oil pump pickup tube, oil pump gasket, and engine oil. The oil pan must be removed to access the oil pump; renewing the pan gasket and inspecting the pan for damage ensures that the rebuilt engine’s lubrication system is as reliable as new. We provide installation guides with torque specifications, gasket handling instructions, and oil leak diagnostic procedures for all WP12 engine variants.
Our inventory includes both standard oil pans for on-highway trucks and heavy-duty versions with reinforced construction for off-highway applications. For generator sets where the engine runs at constant speed, we offer oil pans with additional internal baffling to maintain oil pickup submergence during extended operation. For marine applications, we supply pans with enhanced corrosion-resistant coatings. Specify your application when ordering to receive the correct configuration.
We also provide after-sales documentation including material certificates, dimensional inspection reports, and leak test results upon request. Every WEICHAI WP12 Oil Pan Group is packaged in a foam-lined box with separate compartments for the pan and gasket to prevent damage during transit. Bulk orders receive custom export crating and documentation.
All specifications are based on original WEICHAI WP12 engine data. Actual product configurations may vary by sub-model (Euro III, Euro V, marine, construction, etc.). Always verify part numbers against your engine’s serial number plate before ordering.
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If you have any questions about our products, services, or anything related to what we offer, please don’t hesitate to leave us a message—our dedicated team is always ready to provide prompt and helpful responses to address your concerns. What’s more, when you become our valued customer, we’re delighted to offer you complimentary catalog services, giving you access to detailed, up-to-date information on our full range of products, specifications, and offerings to help you make informed decisions.
We are a first-class heavy duty vehicles and spare parts supplier in China. which covers from engine, gearbox, cab, axle assemblies to main assembly accessories, electrical parts and other chassis parts like brake, clutch and steering parts.
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