What happens if water is used instead of coolant?

[DeHaley]

Using water instead of coolant can cause rust in the engine's water passages and lead to scale buildup, which may block the passages. Additionally, water has a lower boiling point and freezing point, which can affect the engine's normal operation during summer or winter. Below is relevant information about coolant: 1. Working mechanism: Water-cooled engines rely on coolant circulating continuously within the engine to dissipate heat. The coolant follows two circulation paths inside the engine: a major cycle and a minor cycle. When the engine is first started, the coolant undergoes a minor cycle, bypassing the radiator to allow the engine to warm up quickly. After the engine has run for a while, the coolant enters the major cycle, passing through the radiator to dissipate heat, ensuring the engine operates within the optimal temperature range. 2. Precautions: Coolant needs to be replaced regularly. Prolonged use without replacement can lead to an increase in freezing point and a decrease in boiling point, negatively impacting engine performance. Therefore, it is essential to replace the coolant on schedule. It is recommended to change the coolant every 20,000 kilometers.