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.
Antifreeze is added to a 2005 Honda Civic at the coolant overflow tank. Antifreeze is added at a ratio of 50/50 with water for optimal cooling.
It was a bad answered that talked about changing the antifreeze -- not the airconditioning freon.
In the radiator.
Prestone
How do you change the starter on a 1998 Honda Civic ex?
50/50 premix. or Honda premixed and you are good to go.
I think its blue
The amount of anti-freeze that you put in your Honda Civic is dependent upon the colon level in your cooling system. The manufacturer recommends that you keep a minimum of 50 percent antifreeze in the cooling system.
How do you change the ac expansion valve on a 2001 Honda civic
The 1989 Honda Civic is not equipped with an EGR valve.
Your best bet is to call the dealership for a recommendation.
You can change a Honda Civic HX transmission to a manual transmission. It is not an easy job to do.