I want to Flush my Radiator, On a 03 wrx.......Anyone know what i need to

do besides pulling the drain plug....I heard that it's necessary after draining

the coolant out to refill with water and run the engine becuase it will make

sure that the radiator is good and clear..but I am not sure if it could harm

the engine? Also whats the best Coolant/antifreeze to buy<? Premixed or just

buy the concentrated and dilute it? again I was told that buying the

concentrated and then diluting it was better that the premixed one.?

anything will help.Thanks again<<<<