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How Do You Use Coolant Dye?

Published in Automotive Maintenance 2 mins read

You use coolant dye by adding it to your car's radiator and then using a UV light to locate any leaks, as the dye will glow at the leak's location.

Here's a more detailed explanation:

  1. Add the Dye: Pour the coolant dye directly into the radiator, as demonstrated in the video.
  2. Circulate the Dye: Run the engine for a short period to allow the dye to circulate throughout the cooling system. This ensures that the dye reaches all potential leak points.
  3. Use a UV Light: Equip yourself with a UV (ultraviolet) light and UV safety glasses. The glasses help enhance the visibility of the dye.
  4. Inspect for Leaks: Systematically inspect the cooling system components, such as hoses, the radiator, water pump, and engine block, with the UV light in a dimly lit environment.
  5. Identify Leaks: The coolant dye will glow brightly under the UV light at the location of any leaks. In the video, the green dye is clearly visible near the water pump, indicating a leak in that area.

Important Considerations:

  • Safety: Always wear appropriate safety gear, including UV safety glasses, when working with UV lights and automotive fluids.
  • Dye Compatibility: Ensure the coolant dye is compatible with your vehicle's coolant type.
  • Concentration: Follow the manufacturer's instructions regarding the correct amount of dye to use.
  • Clean Up: After identifying and repairing the leak, consider flushing the cooling system to remove any residual dye.

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