Originally Posted by vwnate1

It has worked for me on several old klunker Mercedes I bought that had thick red goop in the cooling system ~ if you found leaks , they were plugged with rust , that's not a fault of the flushing ! . it CANNOT DAMAGE anything ! .

I agree , if your 25 year old car has been properly maintained since new(rare)
then maybe this procedure isn't for you .

I also live in an area that has terribly bad had water that eats coling systems alive .

Hard Water is very good for brewing beer though , we have lots of micro breweries here for just that reason