Car Basics

Understanding Engine Coolant

Learn how coolant protects your engine from overheating and freezing.

4 min read4 sections

1What Coolant Does

Coolant (antifreeze) circulates through your engine, absorbing heat and transferring it to the radiator. It also prevents freezing in winter and protects against corrosion year-round.

2Checking Coolant Level

Look at the translucent reservoir under the hood. Coolant should be between MIN and MAX lines. Check when the engine is COLD to avoid burns.

Pro Tip: NEVER open the radiator cap when the engine is hot. Pressurized steam can cause severe burns.

3Coolant Colors

Different manufacturers use different colors (green, orange, pink, blue). Never mix colors unless you know they're compatible. Stick to what your vehicle uses.

4When to Replace

Most coolant should be flushed every 5 years or 100,000 km. Check your owner's manual for your specific interval.

Key Takeaways

  • 1Check level when engine is cold
  • 2Never mix coolant colors
  • 3Flush every 5 years or 100,000 km
  • 4Low coolant = check for leaks

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