Dongfeng VL truck parts Lower bumper grille 8406036-C4303 in stocked

Built to withstand frequent impacts from road debris (e.g., gravel, small stones) and minor curb collisions, the grille is crafted from a high-performance PP+EPDM composite (75% polypropylene, 25% ethylene propylene diene monomer). This material delivers exceptional impact resistance (notched Izod strength: 12 kJ/m² at -35°C) to avoid cracking in frigid climates, while its inherent flexibility allows it to absorb shocks from uneven terrain without permanent deformation. It resists heat deformation up to 115°C, retaining shape under direct sunlight or engine bay heat—preventing warping that could block airflow to the radiator. The composite also exhibits strong chemical resistance, withstanding exposure to road salt, diesel fuel, and automotive cleaning agents without discoloration or material degradation (tested to 450 hours of chemical immersion). Compared to brittle ABS plastic grilles, this PP+EPDM design extends service life by 65% under heavy-duty use, maintaining structural integrity for over 130,000 km

Engineered to balance maximum cooling airflow and under-hood protection, the grille features a reinforced hexagonal grid pattern with 16mm×16mm openings. This design allows 96% of required cooling airflow (≥850 m³/h) to reach the radiator and intercooler—critical for maintaining the VL’s 6.7L/7.8L diesel engine at optimal operating temperature (85–95°C) during heavy-load hauling. Simultaneously, the grid blocks 82% of road debris larger than 10mm (e.g., stones, sticks) from entering the engine bay, reducing the risk of damage to the radiator fins or electrical components. The grid’s vertical and horizontal ribs (3.2mm thick) are reinforced at intersection points, increasing torsional stiffness by 40% and preventing bending when the grille comes into contact with curbs or obstacles at low speeds. A 6mm-tall raised outer lip along the grille’s perimeter guides rainwater away from the radiator shroud, minimizing water splashes onto sensitive under-hood parts

Designed to endure harsh outdoor conditions, the grille undergoes a three-stage protective coating process. First, a zinc phosphate primer (15μm thickness) is applied to enhance coating adhesion and prevent composite degradation. Next, a high-build epoxy mid-coat (20μm) creates a smooth, even surface and adds an extra layer of corrosion resistance. Finally, a UV-stabilized polyurethane topcoat (25μm) is baked on (180°C curing) to resist fading, chipping, and UV damage. The topcoat delivers a 90% gloss retention rate after 3,000 hours of xenon lamp aging (equivalent to 4 years of outdoor exposure) and passes 1,300 hours of neutral salt spray testing without rust or coating peeling. For humid or coastal regions, the inner surface of the grille is treated with a moisture-resistant sealant, preventing mold growth or composite hydrolysis caused by prolonged exposure to dampness

Designed for efficient replacement by fleet technicians or DIY owners, the grille uses a user-friendly snap-on design with 14 integrated nylon 66 clips (known for high tensile strength and flexibility). These clips lock into the VL’s lower bumper clip holes, ensuring a secure fit without the need for additional fasteners. Installation takes 12–18 minutes: clean the bumper opening with isopropyl alcohol to remove grease and dust, align the grille’s clips with the bumper’s pre-drilled holes, press firmly until each clip “clicks” into place, and verify no movement during vibration testing. The clips’ tensile strength (≥180N) ensures the grille stays secure even during high-speed driving (up to 100km/h) or travel on unpaved construction roads. The grille’s top edge also includes a self-adhesive EPDM foam strip that seals gaps between the grille and bumper, reducing wind noise by 12% and preventing water intrusion. Each unit undergoes clip retention testing, dimensional inspection via CMM, and airflow performance checks, backed by a 15-month warranty against defects (e.g., clip breakage, coating peeling, grid cracking)