The MAN 5251914-0x95 Oil Nozzle is a critical engine component designed for piston cooling in high-performance MAN diesel engines. Also known as a piston cooling jet or spray nozzle, its primary function is to spray a targeted stream of engine oil onto the underside of the piston crown. This process effectively dissipates heat, preventing the piston from overheating under heavy loads and high-combustion temperatures. By maintaining optimal piston temperatures, this nozzle helps to prevent thermal fatigue, piston seizure, and ring land wear, thereby ensuring engine reliability, efficiency, and longevity. This genuine or high-quality replacement part is engineered to meet MAN’s exact specifications for flow rate and spray pattern, guaranteeing proper engine function and protection.