dom do this!

-make sure the motor is cold and NO accessories are on
-move the temp slider all the way to heat (but don't run the blower)
-pop the cap off, and fill it back up until no more bubbles down into the rad
-start the car with the rad cap off and wait until it reaches operating temperature (will take a while, have a sandwich)
-it will start bubbling, if the level drops, add more
-once it has been running @ OT for a while and the level hasn't dropped, put the cap back on
-fill the overflow to the max line