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:
Locate the radiator cap and turn it counterclockwise to remove it.
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.
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.
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.
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
app to compare personalized quotes from over 50 of the nation’s leading providers, so you can get the coverage you need at a great price. The average Jerry user saves $879 a year on car insurance!
Jerry partners with more than 50 insurance companies, but our content is independently researched, written, and fact-checked by our team of editors and agents. We aren’t paid for reviews or other content.