I am trying to find out which shop(s) use a machine to Flush the cooling system. My Ford Explorer really needs a good cooling system flush to clear it out and at the same time i will probably change the old green coolant to either Prestones new all makes Long life Coolant or G-05. I have tried to do a search on here to see if there are certain types of shops or machines that people recommend over other types so i know I am useing the right type of machine flush but I have been unsucessful. Wish I had the time to do it myself, but between getting married this spring and a new house, i have no time, so I figured the next best thing would be to get it machine flushed. Can anyone tell me where to find a shop or certain type of machine to use. thanks for all the help