When the water pump was replaced a few years ago, green radiator fluid was used. Some cheap idiot used the green stuff. Don't ask me how I know. I wanna do a flush and use Honda fluid. The radiator drain will get most of the fluid, but some will remain in the block. Should I fill with distilled water, get it hot and drain a 2nd time? Remember, in sunny CA a little over diluted fluid is not an issue. Or no big deal, just add the Honda fluid and go. Thanks for your guidance.