Does your antifreeze look like this???

Seriously? Yea I know, I could not believe it either. I actually drained this out of a bike that from the outside looked outstanding. Someone mixed antifreeze and never drained it or the overflow. Long story short, I had to back flush the entire system 5 times. Let this be a lesson on antifreeze and coolant , a lesson on what not to do. Check your antifreeze and coolant overflow "regularly".