Your vehicle's cooling system regulates the temperature around the engine as it operates. It does this by circulating the coolant through the engine to absorb heat and then pass it through the radiator to cool it with air. The coolant goes through a thermostat valve to regulate the flow, and in some vehicles, through a temperature sensor which runs the external cooling fans.
The cooling system and the coolant require regular checkups to make sure everything is working properly. The fluid level must be checked every few weeks to ensure that there are no leaks. It is also recommended to change the coolant every three years and use additives to prevent corrosion. By maintaining the correct level and quality of the coolant, you also extend the life of your radiator. However, over time the radiator can develop cracks and steam damage. This is precisely the reason why you need to have an expert mechanic to test the entire cooling system at least once a year.
When operating seamlessly, your vehicle's cooling system can be your best buddy. But cooling system repairs can be your worst enemy if you are not diligent about proper maintenance. Periodic coolant system checkups are important to avoid expensive coolant system repairs later on. But in case repairs have been done, make sure new coolant is added and your vehicle is road tested to check for signs of overheating, leaking coolant or loss of pressure.