Bingo.
So, basically just open it up, drain the old coolant out, throw the coolant flush in there (keeping the valve open), then should I run water through it after or just close the valve and insert the new coolant?
1) with engine off and cool, remove radiator cap.* Drain radiator then close draincock and radiator cap.
2) Pour entire contents of Prestone® Super Radiator Flush into radiator and fill with water.
Run engine with heater on highest temperature setting for 10 minutes after reaching normal operating temperature.
3) With engine off and cool, remove radiator cap, drain radiator, and close draincock and radiator cap. Refill with water and replace radiator cap to fully closed position. Repeat step #3.
make sure you wait around 20-30 minutes for it to cool before draining.
then you can refill it with half coolant and half water run engine for 20 minutes to mix coolant/water.
