there is a draincock somewhere on the bottom of the radiator. take it out and let all the shit drain out. go grab a bottle of flush from advance/autozone and dump it in the radiator and fill it up with water. start your car up and let it run for a little. pull the bottom hose off and let all the crap drain out, then fill it back up with water and let it go through the motor, then drain it, then fill it, then drain. keep doing that until the water comes out clean. tighten up the draincock...dump in a gallon of antifreeze... top off with water and you're done.