1. Cooling: It absorbs heat generated by the engine's combustion process and prevents overheating. Overheating can cause significant damage to engine components.
2. Preventing Freezing: It lowers the freezing point of the water in the cooling system, preventing it from freezing in cold weather. Frozen water expands, which can crack engine blocks and other parts.
In short, engine coolant protects the engine from both extreme heat and extreme cold, ensuring its longevity and proper function.