How often do you put in water/coolant ? You do use water in the radiator right ? lol

 

^you shouldn't have to add any to the rad or overflow tank. There is a mix of coolant and antifreeze, usually around 50/50. If it is down there is a potential leak and the system may have to be bled after adding or replacement.

 

if you do use water.. be sure to refill it with distilled water.. but the more water you use the more diluted your coolant becomes.. remember you want to keep it around at least 50% coolant:water.. but a few ounces shouldn't hurt..