What is the function of car coolant?

1 Answers
DiIsabel
07/30/25 1:45am
The function of car coolant is to carry away excess heat generated during engine operation, allowing the engine to operate at normal working temperature. Insufficient coolant: When coolant is insufficient, the engine will overheat during operation, leading to damage of engine components. In severe cases, it may cause engine burnout or spontaneous combustion. Therefore, once insufficient coolant is detected, it should be replenished promptly. Additionally, after 6 years of vehicle use, the coolant should be inspected or replaced. Composition of coolant: Engine coolant is not ordinary water but a solution composed of base fluid and water. Due to the requirements of modern automotive technology, various additives are included to address issues such as cavitation, chemical corrosion, electrochemical corrosion, and scale formation, thereby protecting different types of engines. Since the chemical compositions of additives like rust inhibitors and antifoaming agents vary among different types of coolant, they should not be mixed. For example, coolants used in Japanese car models generally contain phosphates but strictly exclude silicates and nitrite additives.
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