How to Add Coolant to the Honda Accord EX

Written by brett johnson
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How to Add Coolant to the Honda Accord EX
Maintain proper coolant levels to help protect your engine. (Auto Engine image by Andrew Breeden from

Antifreeze, or engine coolant, consists of chemical compounds that when added to the radiator help regulate the engine's temperature. The antifreeze increases the boiling point of the water during hot weather and raises the freezing point of the water during cold weather. Generally, a 50/50 mixture of coolant to water is recommended when you're simply adding coolant directly to the radiator. However, a 55/45 mix of coolant to water should be used if you are not completely flushing the engine. This will account for the water remaining in the engine block.

Skill level:

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Things you need

  • Antifreeze

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  1. 1

    Place a bucket under the radiator to catch the excess spillage of the coolant that may occur.

  2. 2

    Raise the hood of the vehicle and brace it open as necessary. Remove the radiator cap and the engine coolant reservoir. The coolant reservoir is usually a clear container and will be clearly labelled. Refer to your owner's manual to be sure.

  3. 3

    Pour half a bottle of new coolant directly into the reservoir.

  4. 4

    Create a 50/50 mix of coolant and water for the radiator by adding water to the other half of the bottle of coolant. Pour this mixture directly into the radiator and fill it to the top.

  5. 5

    Replace both the radiator and reservoir caps. Start the engine and let it run for several minutes. Turn the engine off. Remove the radiator cap and check the fluid level. Add additional coolant as needed.

  6. 6

    Dispose of or properly store any excess antifreeze in a cool, dry play, such as your garage.

Tips and warnings

  • Add coolant only when the engine is cold.
  • Avoid spilling antifreeze and coolant, as they can be harmful to pets and the environment.
  • Always wear protective clothing when handling antifreeze.

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