Antifreeze vs. Water

Q: What will happen if my car only has water in the radiator and gets cold enough to freeze?

A: If it gets cold enough, the frozen water (since it expands) could crack the block, radiator, or water pump. You need to have the water drained and replaced with a 50% water to 50% antifreeze mixture. This will protect your engine down to -34 degrees Fahrenheit.