Dongfeng Renault engine parts Water pump outlet pipe assembly D5010477497

Engineered to maximize coolant circulation efficiency, the pipe features a smooth, mandrel-bent internal surface with no flat spots or restrictions—critical for maintaining consistent flow rates (up to 80 L/min) required to cool Dongfeng Renault’s high-performance engines. The inner wall is polished to a surface roughness of Ra ≤ 0.8μm, minimizing flow resistance and preventing coolant stagnation (which causes localized overheating). Unlike crush-bent pipes with irregular inner profiles that reduce flow by 15–20%, this optimized design ensures the water pump delivers sufficient coolant to the radiator, even under peak engine loads (e.g., uphill hauling at high RPM). The pipe’s diameter is calibrated to match the water pump’s output capacity, avoiding pressure buildup that could damage the pump seal or radiator

To prevent coolant leaks (a leading cause of engine overheating), the assembly integrates a multi-layer sealing solution. Each flange is equipped with a rubber-coated metal gasket (EPDM rubber bonded to steel) that conforms to minor surface irregularities, creating a tight seal even under thermal expansion. The flanges are precision-machined to a flatness tolerance of ≤ 0.1mm, ensuring uniform gasket compression when torqued to Dongfeng Renault’s specified values (25–30 N·m). Additionally, the pipe’s joint connections (where bends meet straight sections) are heat-welded using TIG welding technology, eliminating seam gaps that often leak in low-quality pipes. Unlike pipes with glued or clamped joints, this welded design maintains structural integrity and leak resistance through 10,000+ thermal cycles (-40°C to 120°C)

Built to withstand the harsh conditions of engine cooling systems (exposure to high temperatures, coolant additives, and corrosion), the pipe assembly uses rugged materials. The pipe body is made of glass fiber-reinforced nylon (PA66-GF30), a thermoplastic that retains rigidity at temperatures up to 140°C (the maximum coolant temperature in Dongfeng Renault engines) and resists chemical degradation from ethylene glycol-based coolants. Unlike metal pipes that rust or corrode over time, PA66-GF30 is immune to coolant-induced oxidation and road salt contamination, extending the assembly’s service life to 5+ years. The flanges are made of aluminum alloy (6061-T6) that provides high strength-to-weight ratio and compatibility with the engine’s metal components, ensuring secure mounting without cracking

Designed for efficient replacement in repair shops, the assembly simplifies installation with user-friendly features. It includes pre-marked alignment indicators that match reference points on the engine, guiding technicians to position the pipe correctly without guesswork. The package includes all necessary hardware: OEM-specification bolts, washers, and gaskets—no additional parts are needed. Installation takes 30–45 minutes with standard hand tools, as the pipe fits into existing mounting brackets without modifications. To guarantee quality, each unit is manufactured in an IATF 16949 certified facility and undergoes strict testing: pressure testing (1.5 bar for 10 minutes to check for leaks), thermal cycling trials, and dimensional verification via coordinate measuring machine (CMM). Backed by a 24-month warranty against manufacturing defects (e.g., weld failure, flange cracking, or material degradation), it provides Dongfeng Renault engine owners with reliable cooling system performance and long-term peace of mind