I'm going to autocross my beat for the first time ever...only they want me to drain my coolant and change it with 100% water. Apparently the glycol if it gets on the track will cause all sorts of issues, so they make all auto-cross users run 100% water.

Is this ok to use on the beat? Can i drive it to and from the event without concerns of overheating?

Sounds stupid, but can anyone give me a quick lesson on how to dump coolant, and change with water? Do I have to bleed anything, or just drop'n'drain and refill from rad?