use dish washing detergent ( cascade) just put it in run car a few days then back flush it with thermas stat out.I have run them as long as two months the rad. will look like new and wont hert a thing.......Artie[/QUOTE
I've done this before and it works great. Mostly if you want to get rid of Barsleak or Alumaseal crud. Vinegar works ok in a rusty system but, as stated before nuetralize with baking soda. It's debatable whether it works any better than over the counter radiator flushes. Some otc products work fairly well, others not-so-good. I also would be cautious with vinegar in the aluminum/plastic radiators in modern cars.
