What it is - An expansion tank, also known as an overflow bottle, is used in the cooling system of most internal combustion engines to allow coolant, antifreeze and air to expand as temperature and pressure rise. Why you need it - Prevents venting and permanent loss of coolant by letting the coolant be drawn back into the cooling system when the engine cools. - Helps keep the engine at the correct temperature under varying conditions and reduces the risk of overheating and related engine stalling. Key functions and benefits - Replacement coolant reservoir for the radiator to maintain optimal engine temperature across different driving conditions. - Supports reliable engine operation by accommodating coolant expansion and reabsorption during cool-down. - Reduces coolant loss and simplifies cooling system management. Material and durability - Made of high density aluminium for strength and durability. - Heat resistant and rust proof, offering a long service life. Compatibility and performance - Designed as a replacement coolant reservoir for the radiator and suitable for use in most internal combustion engine cooling systems. - Provides stable performance in a wide range of vehicles and operating conditions. What makes it stand out - Robust aluminium construction combines heat resistance with corrosion resistance for longevity. - Clear benefits in preventing overheating, maintaining coolant levels, and avoiding engine stalling due to coolant loss. Use scenarios - Hot weather or high-load driving: expands coolant as temperatures rise; the tank accommodates the extra volume. - After a radiator or reservoir issue: acts as a reliable replacement to restore proper cooling system function. - Regular maintenance on engines prone to overheating: helps ensure consistent coolant management and engine temperature control. Notes - Installation replaces the existing coolant reservoir in the radiator system. - Suitable for most engines and radiator configurations that use a coolant expansion tank.