Hey gang, I just tried a neat trick and cleaned up my dirty coolant overflow bottle. I remember my Dad would go down to the beach and clean the camping cast iron cookware by rubbing sand in them. So I figured I'd try it seeing as nothing else was working. I put about a cup of water in it with about a cup of play sand and plugged both ends, shook the bejeebers out of it and it came out clean as a whistle! I don't know about you all, but mine was so dirty I couldn't see the fluid level in it and it was driving me nuts. (Don't have far to drive.)
Here's the results:
Ron