What are the symptoms of insufficient coolant in a car?

[Alice]

Insufficient coolant in a car can prevent the coolant from circulating properly, leading to inadequate engine cooling and resulting in engine overheating. In severe cases, it may cause engine damage. Functions of coolant: Coolant is a special additive-containing liquid primarily used in liquid-cooled engine cooling systems. It offers excellent properties such as antifreeze protection in winter, anti-boil in summer, and year-round prevention of scale and corrosion. Can different coolants be mixed? It is essential to use the same brand of coolant. Different brands may have varying production formulas, and mixing them could trigger chemical reactions between additives, rendering them ineffective. How to choose coolant: The key indicators for coolant are its freezing and boiling points. Market-available coolants come in specifications like -15°C, -25°C, -30°C, and -40°C freezing points. Generally, select a coolant with a freezing point at least 10°C lower than the lowest temperature in your region. How to choose coolant: Generally, select a coolant with a freezing point at least 10°C lower than the lowest temperature in your region.