Dongfeng LoongGine Engine parts Water outlet pipe assembly 1118156-E9C00

Engineered with a smooth, unrestricted internal flow path, the 1118156-E9C00 water outlet pipe maximizes coolant transmission efficiency—critical for maintaining the Dongfeng LoongGine engine’s optimal operating temperature (85-95°C). The pipe features a consistent inner diameter (1.5 inches) and gradual bend angles (no sharp turns exceeding 45°), which minimize flow resistance and turbulence. Computational Fluid Dynamics (CFD) simulations confirm that the pipe reduces coolant pressure loss by up to 10% compared to generic aftermarket pipes, ensuring a steady coolant flow rate of 15-20 L/min (at maximum engine speed). This optimized design helps the radiator rapidly dissipate heat from the engine, preventing overheating even under high-load conditions (e.g., heavy hauling, climbing steep grades, or prolonged idling in hot environments)

Constructed from high-grade 6063-T5 aluminum alloy, this water outlet pipe assembly balances exceptional heat resistance with long-term corrosion protection. The 6063-T5 aluminum alloy maintains structural integrity even when exposed to high-temperature coolant (up to 120°C) and engine compartment heat (up to 180°C), avoiding deformation or cracking that can occur with plastic or low-grade metal pipes. The alloy also features a natural oxide layer that resists corrosion from coolant additives (e.g., ethylene glycol) and moisture, preventing rust buildup or pipe wall thinning. Additionally, the pipe undergoes an anodizing treatment to enhance its surface hardness (up to 150 HV) and further improve corrosion resistance. Through 3000+ hours of thermal cycle testing and 5000+ hours of salt-spray testing, the assembly shows no signs of degradation, ensuring a service life of over 150,000 kilometers

Designed to eliminate coolant leaks—a common cause of engine overheating—the 1118156-E9C00 water outlet pipe features a multi-point sealing system. Both the cylinder head-side and thermostat housing-side flanges are precision-machined to a flatness tolerance of ≤ 0.05mm, ensuring full contact with the corresponding gaskets. The assembly includes high-temperature resistant silicone gaskets (rated for -40°C to 200°C) that compress uniformly during installation to form an airtight seal. For added protection, the pipe’s flange bolt holes are equipped with copper washers that distribute clamping force evenly, preventing local deformation of the aluminum flange and ensuring long-term seal integrity. The pipe also features a built-in O-ring groove at the radiator inlet connection, accepting a nitrile rubber O-ring that seals against coolant leakage during thermal expansion. Through pressure testing at 1.2MPa (the maximum pressure of Dongfeng LoongGine cooling systems), the assembly maintains a leak rate of less than 0.01 psi/min, guaranteeing reliable performance

Engineered for hassle-free installation and minimal upkeep, the 1118156-E9C00 water outlet pipe assembly requires no specialized tools or modifications to the engine. It comes with pre-assembled flanges, all necessary gaskets (silicone and O-rings), and high-strength stainless steel mounting bolts—eliminating the need for separate part sourcing. The pipe’s lightweight design (only 0.8kg) and pre-marked alignment indicators make it easy for technicians to position correctly, and the bolt holes align directly with the engine’s original mounting points. The entire installation process takes less than 30 minutes using standard hand tools (e.g., a torque wrench and socket set). For maintenance, the aluminum alloy construction is easy to clean—periodic wiping with a damp cloth removes dust or oil residue, and the corrosion-resistant material requires no additional treatments (e.g., painting or anti-rust coatings). Unlike plastic pipes that degrade over time or steel pipes that rust, this assembly maintains its performance with minimal maintenance, reducing long-term repair costs for fleet operators and vehicle owners