Obviously well doing this I must be careful not to get the alternator wet. I was going to mix the coolant in a new clean 5 gallon bucket because my truck takes 17 1/2 quarts so getting a prefect 50/50 ratio with that number would be a pain. I also bought a flush kit that you attach to the heater hose, only cost 3.00 can't beat that. Btw, how do you use the super clean stuff from Prestone? I know there are instructions on the container I just was wondering what they mean. Also need help on the block heater install. I know the install part, but its the removing the frost plug that I don't know how to do.