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How to Check Coolant Level in Your Car

The blog explains how to safely check a car’s coolant level using the radiator and overflow tank. It also covers the importance of regular checks to maintain engine health and avoid overheating.

  • 14 May 2025
  • 3 min read
  • 3 views

Coolant, also known as radiator fluid, helps regulate your engine's temperature by drawing heat away. Maintaining the right coolant level is essential for smooth engine performance and preventing overheating.

Let’s explore how to check car coolant level safely and effectively.

Steps on how to check car coolant level

Here’s how to check the coolant level in a car:

Method 1: Checking the overflow tank

This is the easiest and safest way for most current cars:

  • Locate the liquid overflow tank (a transparent plastic container near the radiator)
  • Check the cooling amount against the "Full" (F) and "Low" (L) marks on the side
  • If the amount is at or below the "Low" mark, you'll need to add coolant or water
  • Verify that the tube connecting the overflow tank to the radiator is intact

Method 2: Checking the radiator directly

For a more thorough check (when the engine is completely cool):

  • At the front of the engine area, locate the radiator
  • Carefully remove the radiator cap by pressing down and turning counterclockwise
  • The coolant should be visible at or near the top of the radiator
  • If you can't see the liquid or it's significantly below the top, your level is too low

FAQs

How often should I check my car's coolant level?

Check your radiator coolant level at least twice a year—ideally before summer and winter. If your temperature gauge rises unusually or you see any cooling system warning lights, check it right away.

Can I add water instead of cooling in an emergency?

In an emergency, you can add water briefly, but replace it with proper coolant as soon as possible. Plain water lacks the anti-freeze, anti-corrosion and lubrication qualities of coolant.

What's the difference between coolant and antifreeze?

Antifreeze is the concentrated recipe, while coolant is usually a mix of antifreeze and water. Most cars use pre-mixed fluid.

Conclusion

By following these steps on how to check coolant level of your car, you can prevent bigger issues in the long run. While maintaining the correct coolant level is vital for your engine’s health, it’s equally important to schedule regular professional maintenance and ensure you have the right car insurance in place.

Third party car insurance offers basic coverage for any damage you may cause to others. On the other hand, comprehensive car insurance provides wider protection, covering accidents, theft, natural disasters and more.





Disclaimer: The information provided in this blog is for educational and informational purposes only. It may contain outdated data and information regarding the topic featured in the article. It is advised to verify the currency and relevance of the data and information before taking any major steps. ICICI Lombard is not liable for any inaccuracies or consequences resulting from the use of this outdated information.

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