■ The car radiator, also known as the cooling system or overflow tank, is a crucial component of water-cooled engines. It also serves as a heat exchanger for water-cooled engines, dissipating heat through air convection cooling to maintain the engine's normal operating temperature.
■ The working principle of a car radiator involves coolant circulating through the engine's water channels, absorbing heat from the cylinder block, and then dissipating it through large-area cooling fins to maintain the engine's appropriate operating temperature. The car radiator consists of a radiator core, water pipes, cooling fins, and upper and lower water tanks.
■ The main function of a car radiator is to dissipate heat. The coolant absorbs heat in the water jacket, flows to the radiator where the heat is dispersed, and then returns to the water jacket in a cycle, preventing the engine from overheating and achieving temperature regulation.

■ When the water in the radiator appears red, it is caused by rust. Under normal circumstances, do not add ordinary water, as it is alkaline or acidic and can cause the radiator to rust and damage. Coolant has lubricating and protective properties, and different pH value coolants should be chosen based on the radiator material.
■ The engine's heat is transferred through the coolant liquid circuit, using coolant as a heat carrier, and then dissipated through large-area cooling fins by convection to maintain the engine's appropriate operating temperature.

■ Corrosion resistance: Aluminum alloy radiators are made of high-purity aluminum, offering high corrosion resistance. They are less prone to rusting, thus maximizing the vehicle's service life.
■ Good thermal conductivity: Compared to traditional copper or steel radiators, aluminum alloy radiators have stronger thermal conductivity. They heat up and cool down more quickly, effectively preventing engine overheating and damage.
■ Lightweight: Compared to radiators made of other materials, all-aluminum radiators are lighter, reducing the overall vehicle weight and improving power performance and fuel efficiency.
■ Environmentally friendly: All-aluminum radiators align with environmental-protection concepts and have been widely applied and promoted in the automotive industry. Foreign car radiators are mostly aluminum, mainly considering environmental protection (especially in European and American countries).

■ To prevent the coolant in the radiator from boiling, pay attention to the temperature displayed on the dashboard while driving. If you notice the temperature is too high, you must stop and check immediately.
■ If you notice the engine smoke, stop the car immediately, open the hood to increase heat dissipation, and preferably choose a well-ventilated place to park. Try to avoid stopping in tunnels or relatively enclosed areas.
■ Replace coolant regularly. The coolant in the car radiator circulates for a long time and inevitably accumulates various impurities, affecting heat dissipation. Therefore, replace it according to the vehicle manual's recommended time and actual conditions. Generally, coolant should be changed every 60,000 kilometers or two years.

■ Do not use tap water instead of coolant. Take particular care not to use tap water as a substitute for coolant, as the chlorine in tap water can cause scaling, corrosion, and rusting in the radiator, engine, and other systems, leading to poor cooling, reduced heat dissipation, and excessively high engine temperatures.
■ Maintain the engine radiator regularly. Not only does the engine need regular oil change and maintenance, but the car radiator also requires regular maintenance. Car owners must regularly clean the radiator to remove rust and scale to ensure the normal use of the car engine.