Sorry I know it's been done before , but is this the best way to do it
1. Drain out old coolant, put hose through to get out as much as possible
2. Fill with water and one of those 250ml bottle of radiator flush.
3. Run car for 15mins (ideally drive for a day but is 15mins ok?).
4. Drain out let cool
5. Add plain water
6. Run car till circulated through with radiator cap off
7. Drain out
8. Finally fill car with water and appropriate amount of coolant.
Is it alright if there is still some left over coolant when you add the radiator flush ( I assume that it should be as I think it is what it is made for...to flush). What is best one to use, Nulon or Wynns. Is it worth using these products, can it really get rid of mild corrosion and save probs down the track?