Dongfeng VL truck parts Lower bumper grille 8406036-C4301

Built to withstand frequent impacts from road debris (e.g., stones, gravel) and minor curb collisions, the grille is crafted from a high-performance PP+TPO composite (80% polypropylene, 20% thermoplastic olefin). This material delivers exceptional impact resistance (notched Izod strength: 11 kJ/m² at -30°C) to avoid cracking in cold climates, while maintaining flexibility to absorb shocks from uneven terrain. It resists heat deformation up to 110°C, retaining shape under direct sunlight or heat radiated from the engine bay—preventing warping that could block airflow to the radiator. The composite also has excellent chemical resistance, withstanding exposure to road salt, diesel fuel, and car wash detergents without discoloration or degradation (tested to 400 hours of chemical immersion). Compared to brittle ABS plastic grilles, this PP+TPO design extends service life by 60% under heavy-duty use, retaining structural integrity for over 120,000 km

Engineered to balance maximum airflow and debris protection, the grille features a hexagonal grid pattern with 15mm×15mm openings—large enough to allow 95% of required cooling airflow (≥800 m³/h) to the radiator and intercooler, while blocking 80% of road debris larger than 10mm (e.g., small stones, sticks) from entering the engine bay. The grid’s vertical and horizontal ribs (3mm thick) are reinforced at intersection points, enhancing the grille’s torsional stiffness by 35% and preventing bending under pressure (e.g., when hitting a curb at low speed). A raised outer lip (5mm tall) runs along the grille’s perimeter, guiding rainwater away from the radiator shroud and reducing water splashes onto electrical components. Unlike open-mesh grilles that offer minimal protection, this design ensures the VL’s cooling system stays unobstructed while shielding critical under-hood parts

Designed to endure outdoor elements, the grille undergoes a dual-protection treatment. The outer surface is coated with a UV-stabilized acrylic finish (25μm thickness) that blocks 99% of UVA/UVB rays, preventing fading or brittleness—even after 2,500 hours of direct sunlight exposure (equivalent to 3 years of outdoor use). The inner surface features a corrosion-resistant primer (15μm thickness) that protects the composite from moisture-induced degradation (common in humid or rainy regions). Testing confirms the grille resists color fading by ≤2% after 1,000 hours of xenon lamp aging and shows no signs of cracking or peeling after 1,200 hours of neutral salt spray testing. This weather resistance ensures the grille maintains its appearance and functionality in harsh environments, from desert heat to coastal humidity

Designed for quick, hassle-free replacement by fleet technicians or DIY owners, the grille uses a snap-on design with 12 integrated nylon clips (grade PA66 for flexibility and strength) that lock into the VL’s lower bumper clip holes. Installation takes 10–15 minutes: clean the bumper opening with isopropyl alcohol to remove grease/dust, align the grille’s clips with the bumper holes, press firmly until the clips “click” into place, and verify no movement. The clips’ tensile strength (≥170N) ensures the grille stays secure even during high-speed driving or vibration (e.g., unpaved construction roads). For added stability, the grille’s top edge includes a self-adhesive foam strip that seals gaps between the grille and bumper, preventing wind noise and water intrusion. Each unit undergoes clip retention testing, dimensional inspection, and airflow verification, backed by a 12-month warranty against defects (e.g., clip breakage, coating peeling, grid cracking)