What is the Difference Between Adding Water and Coolant to the Engine?
2 Answers
There are the following differences between adding water and coolant to the engine: 1. Effects of adding water: Adding water to a car can corrode the radiator, produce scale, affect the normal heat dissipation of the radiator, and shorten its lifespan. Below freezing temperatures, water can freeze, leading to radiator damage and other consequences. 2. Effects of adding coolant: Adding coolant to a car can prevent the coolant from freezing when the vehicle is parked in cold seasons, which could otherwise cause the radiator to crack or the engine block to freeze. Below is relevant information about coolant: 1. Concept: Coolant, also known as antifreeze coolant, serves both antifreeze and cooling purposes. 2. Function: Coolant has functions such as antifreeze, cooling, corrosion prevention, and scale prevention. Although coolant also contains water, this water is soft water, specifically distilled water, which has undergone deionization and softening treatment. If the engine coolant is insufficient, soft water can be added, but the amount should be carefully controlled to avoid altering the coolant's boiling and freezing points. However, hard water like tap water should not be added, as it can cause adverse effects.
I used to think adding water was convenient and cost-effective, but after a hard lesson, I understood the difference. Once during a long summer drive, I topped up the coolant with water due to low levels, which triggered an engine overheating alarm and nearly damaged the engine. Water has a lower boiling point, making it prone to boiling off and losing its antifreeze effect under high temperatures. In winter, it's even riskier as it can freeze and expand, potentially cracking the radiator. Antifreeze, on the other hand, contains additives to prevent boiling and corrosion, ensuring stable temperatures and protecting metal components. Now, I always insist on using specialized antifreeze during maintenance to prevent minor issues from turning into major problems. Remember, adding water is only a temporary emergency fix—using it long-term can ruin your car and isn’t worth the risk. Safety should always come first; never cut corners.
