hi . i have a 99 accord ex and i need to flush my radiator fluid. i have no idea what to do so who can help me out. thanks.

 

let the car cool down

take the rad cap off

and under the car on the bottom of the rad there will be a plastic wing nut. unscrew and watch it flow from the nipple--------------and catch in a bottle

 

He said flush it, not drain it.

Use a coolant flushing machine. It's the best way to flush out the radiator and all it's components.

 

Somewhere between those 2 extremes, how about this...

1 Drain the radiator like Rope says.
2 Back of the block, near the oil filter, is a drain bolt to let out more coolant.
3 Fill, run, & drain a few times until it comes out clear.
4 Add 1 gallon antifreeze & enough water to fill.
5 Run, push air towards bleeder screw at thermostat, or to radiator cap.

ps... have the heater temperature set to full-hot the entire time.

 

Don't forget to go ahead and replace the thermostat while draining fluid. I use Honda antifreeze because it's long life and already pre mixed.