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How-To: Flushing Your Car Radiator

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  • Remove the radiator cap only after engine is cool. A hot engine can produce pressure in the cooling system.
  • Remove the radiator drain plug, and collect the old fluid in a basin. (Warning: Coolant is extremely toxic and needs to be disposed of properly.)
  • Once all the fluid is drained, put the drain plug back in.
  • Check your car's manual for the proper coolant to use in your car.
  • Fill the radiator with new coolant and replace the radiator cap.
  • Check the coolant reservoir bottle to insure the levels are correct.

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