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Honda Civic how to change antifreeze?

Updated: 10/20/2022
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14y ago

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remove the drain plug on the bottom of your radiator, this wil drain all the coolant. then put the drain plug back in, remove radiator cap on top and refill the RADIATOR (not overflow tank)with 50/50 mixed coolant (the green kind). When it's full put the radiator cap back on and put some coolant in the overflow tank. start the car and follow the upper radiator hose until you find the bleeder bolt (its a 10 or 12mm bolt i believe with a hole in top) attach a clear hose to the bleeder bolt and loosen it a bit. you'll see coolant start to flow out and it will have bubbles in it. when the bubbles stop, tighten the bleeder bolt and your coolant system has been properly bled. (keep an eye on coolant level in overflow tank while you do this, if it runs out you have to bleed again) bleeding the system removes air and keeps makes cooling more effective.

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14y ago
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Q: Honda Civic how to change antifreeze?
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