H16008-0900
Product Details
1. Basic Overview & Core Functional Positioning
The H16008-0900 Oil Pump is a genuine OEM lubrication system component exclusively designed and manufactured for the Changan CS35 compact SUV series, matching the factory 478-series naturally aspirated gasoline engine equipped on early-generation Changan CS35 models from 2012 to 2019. Known as the core power source of the engine lubrication system, this oil pump is installed inside the engine oil pan and driven synchronously by the engine crankshaft. It serves as the fundamental component that provides stable circulating oil pressure for the entire engine, widely recognized as the “heart of engine lubrication”. Its primary responsibility is to extract low-pressure engine oil from the oil pan, pressurize the oil, and deliver it to every friction surface and hydraulic mechanism inside the engine, including crankshaft bearings, connecting rod bearings, piston assemblies, camshafts, timing chains, and VVT hydraulic systems.
Beyond basic lubrication, the H16008-0900 Oil Pump undertakes multiple extended functional missions to guarantee stable engine operation. It forms continuous oil circulation to take away excessive heat generated by high-speed mechanical friction, realizing active engine cooling and preventing local overheating. Meanwhile, the flowing engine oil carries tiny metal debris, carbon deposits, and dust to the oil filter for purification, achieving self-cleaning of the internal engine system. Additionally, it provides stable hydraulic oil pressure for the VVT timing system and chain tensioner, ensuring precise variable valve timing adjustment and eliminating timing chain jitter. By maintaining standard oil pressure under all working conditions, this oil pump effectively reduces mechanical friction loss, lowers engine operating noise, extends engine service life, and optimizes fuel economy and power output performance of the Changan CS35 engine.
The part number H16008-0900 is a dedicated exclusive specification for Changan CS35 478 engine platforms, with unique displacement parameters, driving tooth specifications, and mounting hole positions. It cannot be interchanged with oil pumps of Changan CS35 PLUS, CS75, Eado or other displacement engine models. Produced in strict accordance with Changan original factory design standards and IATF 16949 international automotive quality management system, all oil pressure output values, rotating speed matching ratios and dimensional tolerances are precisely calibrated for the CS35 engine. Compared with inferior aftermarket oil pumps that suffer from insufficient oil pressure, unstable pressure output and easy wear, the genuine H16008-0900 oil pump effectively avoids common engine faults such as lubrication failure, abnormal engine noise, power attenuation, and accelerated component wear, maintaining long-term stable engine operation.
2. Material Selection & Manufacturing Standards
The H16008-0900 Oil Pump adopts high-strength automotive-grade cast iron and wear-resistant alloy materials, specially optimized to adapt to long-term high-speed operation, high-pressure oil impact, and complex lubricating oil erosion inside the engine. The pump body shell is made of high-density gray cast iron with excellent rigidity, pressure resistance and vibration resistance. This material is not easy to deform under long-term high-temperature and high-pressure working conditions, ensuring stable internal pump cavity clearance and avoiding oil pressure leakage caused by shell deformation. The internal driving rotor and driven rotor are forged from high-hardness alloy steel, and undergo precision quenching and tempering heat treatment, featuring ultra-low friction coefficient, strong wear resistance and fatigue resistance, which can maintain precise meshing accuracy after hundreds of thousands of kilometers of high-speed operation.
The pressure relief valve assembly and internal sealing accessories adopt high-temperature resistant and oil-resistant composite materials, which can adapt to the engine’s extreme working temperature range from -30°C to 150°C. The built-in precision pressure regulating spring is made of high-strength alloy spring steel, with stable elastic coefficient and no fatigue failure after long-term compression cycles, ensuring accurate oil pressure regulation. The oil inlet filter screen is woven with high-density stainless steel wire mesh, which can effectively filter impurities, sludge and metal particles in the engine oil, preventing foreign matter from entering the pump cavity and causing rotor jamming or internal wear. All surface edges of the pump body are precisely deburred and polished to eliminate sharp edges, reduce oil flow resistance, and ensure smooth oil circulation.
The entire production process of the H16008-0900 Oil Pump adopts fully automated precision machining and strict multi-process quality inspection. Finished products undergo professional testing including static and dynamic oil pressure testing, full-speed oil supply stability testing, high and low temperature cycle testing, wear fatigue testing, and sealing performance testing. Each pump is calibrated to the standard oil pressure range of the Changan CS35 478 engine to ensure stable oil pressure output at idle speed, low speed and high speed. After strict factory screening, the genuine oil pump features stable performance, low failure rate and long service life, fully meeting Changan’s strict engine reliability and durability standards.
3. Structural Composition & Working Principle
The H16008-0900 Oil Pump adopts a mature and reliable rotor-type positive displacement structure, which is the mainstream and stable lubrication pump structure for Changan’s classic 478 engines. The overall structure is compact and highly integrated, mainly composed of cast iron pump body, inner driving rotor, outer driven rotor, pressure relief valve assembly, stainless steel oil filter screen, oil inlet and outlet passages, and fixed mounting bolt holes. The pump body is designed with integrated positioning steps and mounting holes, which perfectly matches the installation position and crankshaft driving structure of the Changan CS35 engine, ensuring accurate assembly and stable power transmission.
The working principle follows positive displacement pressurization circulation. Driven by the engine crankshaft, the inner driving rotor rotates synchronously, driving the outer driven rotor to perform meshing operation. During rotor rotation, the volume of the oil suction cavity continuously increases to form negative pressure, which sucks engine oil from the oil pan into the pump cavity through the filter screen. With the continuous rotation of the rotor, the oil cavity volume decreases gradually, and the engine oil is squeezed and pressurized, then delivered to the engine main oil passage through the oil outlet. The built-in pressure relief valve plays a protective role: when the engine speed is too high and the oil pressure exceeds the preset threshold, the pressure relief valve automatically opens to release excess oil pressure, preventing excessive oil pressure from damaging oil seals, gaskets and lubrication pipelines.
This structural design realizes adaptive oil supply with engine speed changes. At idle speed, it maintains low and stable oil pressure to ensure basic engine lubrication and avoid idle jitter caused by insufficient lubrication. At medium and high speeds, it increases oil supply and oil pressure synchronously to meet the enhanced lubrication and heat dissipation demands of high-load engine operation. The optimized rotor gap and oil passage design effectively reduce oil pressure loss and response delay, ensuring instant oil supply when the engine starts, realizing zero-delay lubrication of engine components, and effectively protecting the engine from dry friction wear during cold start.
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