How Cold to Freeze a Car Engine
When the temperature drops, it’s important to take precautions to protect your car engine from freezing. If the engine coolant freezes, it can expand and damage the engine block, cylinder heads, or other components. This can lead to costly repairs.
The temperature at which an engine coolant freezes depends on the type of coolant used. Most coolants are made up of a mixture of water and antifreeze. The antifreeze lowers the freezing point of the coolant, so it can withstand lower temperatures without freezing.
Freezing Points of Coolants
- 50/50 mixture of water and antifreeze: -34°F (-37°C)
- 70/30 mixture of water and antifreeze: -40°F (-40°C)
- 100% antifreeze: -60°F (-51°C)
If you live in a cold climate, it’s important to use a coolant with a low freezing point. This will help to protect your engine from freezing in even the coldest weather.
Signs of a Frozen Engine
- The engine will not start.
- There will be a loud banging noise when you try to start the engine.
- The engine will overheat.
- The coolant will be leaking from the engine.
If you suspect that your engine has frozen, do not try to start it. This could cause further damage to the engine. Instead, call a tow truck and have the car towed to a mechanic.
How to Prevent a Frozen Engine
- Use a coolant with a low freezing point.
- Keep the coolant level full.
- Insulate the engine block and radiator.
- Use a block heater.
- Park the car in a garage or other sheltered area.
By following these tips, you can help to protect your car engine from freezing and avoid costly repairs.
