What is the Function of Automotive Coolant?
2 Answers
Automotive coolant serves the functions of anti-scaling, anti-boiling, anti-corrosion, anti-rust, and anti-freezing. Anti-scaling: Excessive scale inside the engine can reduce its operational efficiency and even lead to breakdowns. The use of coolant helps minimize scale formation and prevents external contaminants from entering, while also facilitating the timely removal of existing scale. Anti-boiling: The boiling point of coolant varies with the concentration of its additive, ethylene glycol. During hot summers, it prevents the occurrence of engine overheating ("boiling over"). Anti-corrosion: Mechanical corrosion is a common yet severe issue, typically caused by chemical, physical, and erosive factors, often due to the materials used in automotive machinery. Coolant significantly reduces corrosion damage, ensuring the engine operates more efficiently and healthily. Anti-rust: Oxidation is a frequent occurrence in machinery, leading to scale formation during the process. Coolant effectively controls oxidation and promptly treats any resulting stains. Anti-freezing: Due to its formulation, ethylene glycol can be used at temperatures as low as -70°C, with concentrations ranging between 30% and 50%, and freezing points between -20°C and -45°C. It is crucial to select the appropriate coolant based on the local climate conditions.
I deal with engine coolant frequently in my daily car repairs. It primarily prevents the engine from overheating. When the engine runs, temperatures soar, and the coolant circulates through the system, absorbing heat and carrying it to the radiator at the front to dissipate, keeping the engine at a normal temperature. Otherwise, overheating can damage components, leading to costly repairs. It's also useful in winter—its antifreeze properties prevent the liquid from freezing, avoiding burst pipes. Another key function is corrosion prevention. Metal parts can rust over time, but the additives in coolant protect them from rust and leaks. Remember not to substitute it with water randomly—coolant has a higher boiling point and lower freezing point. Regular replacement is essential; I recommend checking it every two years. If the color turns cloudy or sediment appears, address it immediately, as it can reduce cooling efficiency and increase fuel consumption. When selecting a type, match it correctly—don’t mix green and red varieties, for example, to avoid chemical reactions. Proper maintenance can extend the entire system’s lifespan—safety first!
