While water can provide some cooling, it has several disadvantages compared to coolant:
1. Lower Boiling Point: Water boils at a lower temperature (100 degrees Celsius/212 degrees Fahrenheit) than most engine operating temperatures. Using water alone could lead to engine overheating and potential damage.
2. Freezing Point: Water freezes at 0 degrees Celsius/32 degrees Fahrenheit. In cold climates, this can cause freezing and expansion of the water in the engine, leading to cracked engine blocks or other components.
3. Corrosion: Water is corrosive to metals and can cause damage to engine components made of aluminum, iron, and steel.
4. Lack of Additives: Coolant contains additives that protect against corrosion, lubricate the water pump and other components, prevent foaming, and raise the boiling point. Water lacks these additives, which are crucial for engine longevity.
5. Engine Damage: Using water instead of coolant can cause severe engine damage, including warping or cracking of the cylinder head and/or engine block, leading to costly repairs or even engine failure.
It's important to use the recommended coolant specified by the manufacturer for your BMW. This will help ensure proper engine cooling and protection of its components.
