Product: Coolant Tank Cap / Coolant Reservoir Tank Cap / Radiator Reservoir Cap / Radiator Overflow Cap (Reservoir Cap replacement) Key benefits Prevents leaks and maintains correct coolant tank pressure to protect the engine cooling system and reduce the risk of overheating. Durable, heat and pressureresistant construction resists coolant corrosion for dependable, longlasting performance. Simple twiston design installs in seconds with no tools required, making replacement quick and hassle. What it does Seals the coolant reservoir or radiator overflow tank to keep the system pressurized and maintain proper coolant flow. Replaces old, cracked, or worn caps to restore correct pressure control and prevent coolant loss. Important attributes Function: Provides a secure, leakproof seal for coolant reservoirs and radiator overflow tanks. Compatibility: Designed to fit a wide range of vehicle reservoir and radiator overflow applications as a direct replacement for worn or damaged caps. Construction: Made from durable, corrosion and heatresistant materials engineered to withstand system pressure and coolant exposure. Performance: Reliable sealing under heat and pressure for consistent coolingsystem protection. Practical use scenarios Pretrip maintenance: a damaged cap before a long drive to prevent coolant loss and overheating on the road. Routine service: Swap in a cap after coolant flush or system to ensure the reservoir holds correct pressure. Winter storage or summer heat: Upgrade a weakened cap to maintain system integrity during extreme temperatures and heavy engine load. Why choose this cap Restores proper coolant tank pressure and prevents leaks without complicated installation. Built to resist the common stresses of the cooling system for longer service life. Straightforward replacement for worn reservoir or radiator overflow caps to keep your engine protected.