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How do I change the coolant in my Honda Civic?

My engine is running warm. I think it’s time to flush my coolant. What’s the best way to put fresh coolant in my 2012 Honda Civic?

avatar
Matthew Macgugan · Updated on
Reviewed by Shannon Martin, Licensed Insurance Agent.
Nice job paying attention to the
maintenance needs
of your car!
Before you change the coolant in your Honda Civic, make sure your engine is completely cooled off. Otherwise, the built-up pressure in your radiator could cause hot coolant to burst out and burn you.
Here’s how to flush your coolant:
  1. Locate the radiator cap and turn it counterclockwise to remove it.
  2. Under the engine, find the coolant drip hole. Place a drip pan under the hole to collect the old coolant. The drain plug will be at the rear of the radiator, toward the bottom between two engine cooling fans. Turn it counterclockwise and the coolant will begin to drain.
  3. Locate the coolant overflow reservoir to the left of the battery. Unscrew its cap and use a siphon to drain the fluid manually as the main reservoir drains.
  4. Once both the main and overflow reservoirs have drained, return the drain plug and overflow cap to their respective positions. Make sure to avoid overtightening anything.
  5. Place a funnel in the radiator opening. Fill the radiator with a 50/50 coolant mix, which you can purchase at most auto parts stores for under $10 a gallon. A standard Civic will take about 1.4 gallons to refill per the owner’s manual.
Just like that, you’ve changed the coolant in your Honda Civic! Hopefully, that solves your engine temperature problems and you won’t need to visit a
mechanic
. But it never hurts to consult a professional if you lack car experience.
Since you like taking care of your car, spare a minute to review your car insurance policy. Download the
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