To replace the existing cap, first, ensure the engine is cool to avoid any risk of burns or injury. Carefully remove the old cap by turning it counterclockwise. Once removed, take the and align it properly with the opening. Press down gently and turn it clockwise until it is tightly secured. Make sure the cap is firmly in place to prevent any leaks or pressure loss. This is designed to fit perfectly and provide a reliable seal, ensuring optimal performance and safety for your vehicle's cooling system. Always double-check to confirm the cap is securely fastened before driving. Features -Color:White -Material:Plastic -Size:4.10X4.10X1.20cm/1.61X1.61X0.47in -Size:4.10X3.50X1.30cm/1.61X1.38X0.51in -Multimodel compatibility: making it a versatile choice for different vehicles -Robust construction: built with strong and durable materials, this cap offers excellent longevity and resistance to wear -Precision fit: manufactured with precision to ensure an easy and secure installation, reducing the risk of leaks and ensuring a snug fit -Effective seal: designed to provide a tight seal that prevents coolant leaks, protecting your engine from overheating and damage -Reliable : undergoes comprehensive testing to sure durable and safety, ensuring dependable performance Package list: 1pcs car water tank kettle cover