I was reading the groups to find out some info on using CLR to flush/clean the cooling system in a vehicle. I found lots of posts asking if it was a good idea, but none with any links to hard data.
Here is a link to the Jelmar (makers of CLR and other products) where they answer two questions of using CLR for cleaning your cooling system; 1) is it acidic, 2) can I use it in my cooling system.
Yes, it is acidic.
No, they say you should NOT use it to clean your cooling system, and they also say to not use it in your iron because it could damage the internal parts of the iron (ergo, it would seem that it would do the same for your cooling system).
Here's the link:
formatting link
Y'all have fun.
--HC