My car was overheating yesterday so I turned it off and grabbed the radiator hose and it was slushy. I know I put antifreeze in it. How can I melt the slush and flush the coolant? I hope I didn't completely screw myself. PLEASE HELP

 

The ambient temperature will have to be above the freeze point of whatever you have in the cooling system to flush it out. (warmer weather, heated garage, etc)

Before you refill the system, find out the capacity first. Example: If you want a 50/50 mix and the system holds 2 gallons, install 1 gallon of undiluted antifreeze and then top the system off with plain water.