Can I directly add more coolant if it's not enough?

[LunaAnn]

Coolant can be directly added if it's insufficient, but it must be of the same type. Coolant is a special additive-containing liquid primarily used in liquid-cooled engine cooling systems. Functions of coolant: 1. Provides anti-corrosion and rust removal for the engine cooling system; 2. Offers anti-corrosion protection for components of the cooling system; 3. Prevents scale buildup, avoiding reduced heat dissipation efficiency of the radiator; 4. Ensures the engine operates within the normal temperature range. Selection criteria for coolant: 1. Freezing protection effectiveness; 2. Boiling point of the coolant. Types of coolant include: calcium chloride among inorganic compounds, and methanol, ethanol, glycerin, and lubricating oil among organic compounds.