What is the difference between coolant and water?
2 Answers
The differences between coolant and water: 1. Different freezing points: The freezing point of water is 0 degrees; the freezing point of coolant is -40 degrees. 2. Different anti-corrosion properties: Water does not prevent corrosion. If water is added to the engine's cooling system, it can cause rust and scale buildup in the engine's water passages, potentially leading to blockages. Coolant contains ethylene glycol, which prevents corrosion. 3. Different boiling points: The boiling point of water is 100 degrees. When the temperature reaches 100 degrees, water evaporates into steam, gradually reducing the water level. Once the water completely evaporates, it can no longer cool the engine, leading to engine damage. The boiling point of coolant is 108 degrees, making it more resistant to evaporation.
I've been driving for decades, and there's a big difference between coolant and water. Coolant isn't just ordinary water—it prevents freezing and boiling, so your engine won't overheat in summer or freeze in winter. If you use water, it turns to ice below zero degrees, which can crack the engine cooling system and lead to expensive repairs. Coolant contains additives like ethylene glycol, which reduces corrosion, so the radiator and water pump are less likely to rust. I remember once trying to save money by using water, only to have my car fail to start in winter. It cost me over a thousand bucks to get it fixed at the shop. Regularly checking the coolant concentration is crucial—a 1:1 mix with distilled water works best. Never use tap or well water directly, as the impurities can clog the cooling system. Before long trips, always top up with proper coolant for peace of mind on the road.
