Should You Top Up or Replace Insufficient Coolant?

[BrookeRose]

If the coolant level is low but still usable, you can simply top it up with more coolant; if the coolant is no longer usable and the level is low, it needs to be replaced. Most cars use water-cooled engines, which rely on coolant for heat dissipation. In water-cooled engines, the coolant typically follows two circulation paths: a major cycle and a minor cycle. Coolant should be replaced regularly. If not changed for a long time, the coolant's freezing point will rise and boiling point will drop, affecting the engine's normal operation. The full name of coolant is antifreeze coolant, meaning it has antifreeze properties. Antifreeze prevents the coolant from freezing in cold weather, which could otherwise crack the radiator or damage the engine cylinder block.