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- Wanda Plaza, Jinan, Shandong, China
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The WEICHAI WP12 Oil Filter Assembly is a high-efficiency full-flow oil filtration system engineered specifically for the WP12 diesel engine platform. This complete assembly ensures clean lubricating oil circulation by removing contaminants, wear particles, and soot, thereby protecting critical engine components such as bearings, camshafts, and turbochargers. Proper oil filtration is essential for engine longevity and performance, and the WEICHAI WP12 Oil Filter Assembly provides fleet operators and technicians with a reliable, OEM-grade solution for maintaining optimal lubrication. 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 Filter Assembly is a spin-on, full-flow filtration unit mounted on the engine block or filter housing, responsible for removing contaminants from the engine oil before it circulates through the main oil gallery. As the WP12 engine’s primary oil cleaning device, this assembly traps abrasive particles such as carbon deposits, metal wear debris, dust, and soot that accumulate in the oil during operation. By maintaining oil cleanliness, the WEICHAI WP12 Oil Filter Assembly prevents premature wear of crankshaft bearings, camshaft lobes, turbocharger bearings, and piston rings, significantly extending engine life.
The filter assembly consists of a heavy-gauge steel housing that contains a multi-layer synthetic or cellulose filter media, a bypass relief valve, an anti-drainback valve, and a sealing gasket. The filter media is pleated to maximize surface area, typically providing filtration efficiency of 95-98% for particles as small as 5-10 microns. The bypass relief valve opens when the filter becomes clogged or when cold oil is too viscous to flow through the media, allowing unfiltered oil to bypass the filter to prevent oil starvation. The anti-drainback valve prevents oil from draining out of the filter when the engine is off, ensuring immediate lubrication at startup.
The WEICHAI WP12 Oil Filter Assembly 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 filter features a standardized M30×2 mounting thread, making it compatible with a wide range of filter heads and ensuring easy replacement without specialized tools. The housing diameter is approximately 108-110 mm, with a height of 193-195 mm.
In addition to the basic filter element, the complete WEICHAI WP12 Oil Filter Assembly includes the sealing O-ring and the internal bypass valve calibrated to open at approximately 2.5-3.0 bar differential pressure. Some variants also include a magnetic pre-filter element that captures ferrous particles before they reach the main filter media. Replacement filter assemblies are available as complete spin-on units, allowing for quick and clean changeovers without the need for cartridge-style element handling. Genuine assemblies include a traceable batch number and quality certification.
For extreme operating conditions such as continuous high-load operation, dusty environments, or extended oil change intervals, the WEICHAI WP12 Oil Filter Assembly is available in heavy-duty versions with enhanced synthetic media and higher dirt-holding capacity. For marine applications, the filter housing features additional corrosion-resistant coatings to withstand saltwater exposure. The filter’s flow capacity is engineered to match the WP12’s oil pump output, typically rated at 50-60 liters per minute at operating temperature.
Every genuine WEICHAI WP12 Oil Filter Assembly undergoes 100% pressure testing and filtration efficiency verification. Counterfeit filters often use inferior filter media with lower efficiency and dirt-holding capacity, leading to accelerated engine wear. Some counterfeit filters also lack the bypass valve or use incorrectly calibrated springs, which can either restrict oil flow (if the valve opens too late) or allow excessive unfiltered oil to bypass (if the valve opens too early). Always source from authorized distributors to guarantee proper filtration performance and engine protection.
| NO. | Part NO | Description |
|---|---|---|
| 1 | 612630010239 | Oil Filter Assembly (OEM, WP12 Standard) |
| 2 | 612630010239H | Oil Filter Assembly (High-Efficiency, Synthetic Media) |
| 3 | 1000428205 | Oil Filter Element (Replacement, WP12/WP13) |
| 4 | 1000428261 | Oil Filter Assembly (Complete, WP12 Heavy-Duty) |
| 5 | JX1016 | Oil Filter Assembly (Universal Cross-Reference) |
| 6 | LF16285 | Oil Filter Assembly (Fleetguard Cross-Reference) |
| 7 | B7383 | Oil Filter Assembly (Baldwin Cross-Reference) |
| 8 | SJ1016 | Oil Filter Assembly (Alternative Manufacturer) |
| 9 | 1000428205A | Oil Filter Element (Premium Grade, WP12/WP13) |
| 10 | 60327523 | Oil Filter Assembly (OEM Alternate Part Number) |
| 11 | VG12460700031 | Oil Filter Assembly (SINOTRUK Cross-Reference) |
| 12 | 612630010217 | Oil Filter Head / Filter Base Assembly |
| 13 | 612630080554 | Oil Filter Holder / Mounting Bracket |
| 14 | 612630010273 | Oil Filter Gasket / O-Ring Seal Kit |
| 15 | 1000422382 | Oil Filter Element (Fuel/Water Separator, Auxiliary) |
Our WEICHAI WP12 Oil Filter Assembly uses advanced multi-layer synthetic or cellulose filter media that captures 95-98% of contaminants as small as 5-10 microns. This superior filtration efficiency protects engine components from abrasive wear and extends oil change intervals.
The internal bypass relief valve is calibrated to open at 2.5-3.0 bar differential pressure, ensuring oil continues to flow even if the filter becomes clogged. This prevents oil starvation while still maximizing filtration under normal conditions.
Our filter features a high-quality silicone anti-drainback valve that prevents oil from draining out of the filter when the engine is off. This ensures immediate oil pressure and lubrication at cold startup, reducing engine wear by up to 30%.
Our filters are manufactured using original WP12 engine specifications, featuring the standard M30×2 mounting thread and correct gasket diameter (92.6 mm ID × 102 mm OD). No adapters or modifications required for installation on HOWO T7H, SHACMAN Delong F3000, FOTON Auman, Jiefang, and other WP12-powered vehicles.
Each WEICHAI WP12 Oil Filter Assembly is manufactured with a heavy-gauge steel housing that withstands pressure spikes up to 5.0 bar. The filter media is bonded with high-temperature adhesive that resists degradation even at 150°C continuous operation.
We stock complete filter assemblies in warehouses across Asia, Europe, and the Americas. Our filters cross-reference to multiple OEM part numbers (612630010239, 1000428205, JX1016, LF16285, B7383, VG12460700031), ensuring compatibility with all WP12 applications.
Unlike generic aftermarket filters that use low-grade filter media with inconsistent pore sizes, our WEICHAI WP12 Oil Filter Assembly is manufactured to original equipment specifications. The pleated media is precisely spaced to maximize dirt-holding capacity while maintaining low flow restriction. The synthetic fiber construction provides 30% higher contaminant capture than standard cellulose media, extending filter service life by up to 20% without compromising flow.
Furthermore, our filters include a robust bypass valve with a stainless steel spring that maintains calibration across temperature extremes. Many low-cost filters use inferior springs that weaken over time, causing the bypass valve to open prematurely and allow unfiltered oil to circulate. Our bypass valve is tested for 1 million cycles to ensure consistent operation for the life of the filter. The anti-drainback valve is manufactured from high-temperature silicone rubber, not conventional nitrile, ensuring flexibility and sealing integrity even after extended exposure to hot engine oil.
Technical documentation included with the WEICHAI WP12 Oil Filter Assembly provides correct installation torque specifications (hand-tighten plus 3/4 to 1 full turn, or 15-20 Nm), gasket lubrication instructions (apply thin film of clean engine oil to the sealing ring before installation), and a troubleshooting guide for common issues such as oil pressure drop (clogged filter or incorrect bypass valve operation) and filter leaks (incorrect installation or damaged gasket).
For large fleet customers, we offer sample evaluation: order one WEICHAI WP12 Oil Filter Assembly for trial installation. After validation, volume pricing applies. Many return customers report that our filters achieve the full recommended oil change interval (20,000-50,000 km depending on application) without bypass activation, compared to low-cost alternatives that clog prematurely and force bypass within 10,000 km.
Beyond the checklist above, pay attention to any unusual engine noises. A rattling or tapping noise at startup that disappears as the engine warms up may indicate a failing anti-drainback valve allowing oil to drain from the filter. In this case, replace the WEICHAI WP12 Oil Filter Assembly with a quality unit featuring a silicone anti-drainback valve. A persistent knocking noise under load may indicate bearing wear caused by inadequate filtration — inspect the old filter for excessive metal debris by cutting it open and examining the pleats.
For engines operating in extremely dusty environments (mines, quarries, agricultural applications), consider shorter filter change intervals even if oil analysis suggests otherwise. The filter’s dirt-holding capacity can be exhausted by fine dust particles that bypass the air filter. For marine applications, inspect the filter for signs of water ingress at every oil change — water in the oil causes the filter media to swell and collapse, leading to bypass valve activation. If water is present, investigate the source (cracked oil cooler, leaking head gasket, or condensation).
When cutting open a used filter for inspection, use a professional filter cutter to avoid creating metal shavings. After cutting, pull the pleated media apart and examine it under good lighting. The presence of metallic flakes (yellow or silver) indicates bearing or gear wear; black carbon particles indicate soot loading; a gummy or sludgy appearance indicates oil degradation or coolant contamination. Photograph the findings and include them in your service records for warranty or diagnostic purposes.
Finally, maintain a service log for the WEICHAI WP12 Oil Filter Assembly recording installation dates, mileage or hours at change, oil type and viscosity used, oil pressure readings, and any abnormal findings from filter inspection. This data helps predict optimal change intervals for your specific operating conditions. For fleet operators, standardized filter replacement at every oil change (20,000 km for highway trucks, 10,000 km for severe duty) eliminates filter-related oil pressure issues and protects engines from premature wear.
In summary, the WEICHAI WP12 Oil Filter Assembly is the first line of defense against engine wear in the WP12 diesel engine. Its high-efficiency filter media, precision-calibrated bypass valve, and reliable anti-drainback valve ensure that clean, pressurized oil reaches critical engine components at all times. Whether you are performing routine maintenance 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 filter assembly at every oil change ensures that your engine’s lubrication system performs as designed, protecting your investment from premature wear and costly repairs.
For workshops performing engine overhauls or routine service, we recommend ordering the WEICHAI WP12 Oil Filter Assembly together with high-quality diesel engine oil (API CI-4 or higher, appropriate viscosity for your climate) and a new oil drain plug gasket. The oil filter is the most frequently replaced service part on the WP12 engine; stocking genuine filters ensures that your customers receive the protection they expect. We provide installation guides with torque specifications, filter cross-reference charts, and oil change procedures for all WP12 engine variants.
Our inventory includes both standard-duty filters for on-highway trucks and heavy-duty filters with enhanced synthetic media for construction, mining, and marine applications. For generator sets operating at constant speed with extended oil change intervals, we offer long-life filters with increased dirt-holding capacity. Specify your application and desired change interval when ordering to receive the appropriate filter grade.
We also provide after-sales documentation including filtration efficiency test reports, pressure drop curves, and material certificates upon request. Every WEICHAI WP12 Oil Filter Assembly is packaged in a sealed box with a protective cap over the mounting threads to prevent contamination during storage. Bulk orders receive custom palletizing and export 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 the correct filter part number against your engine’s serial number plate or existing filter 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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