I am rather confused about coolant. I know why we need to keep it at 50% 50% but why do people flush the whole thing? and how often?

Because over time the coolant can break down......And not do the job it is inteded to do.

hmm... why do we need to keep it at 50/50... never did to much work with the coolant

hmm... why do we need to keep it at 50/50... never did to much work with the coolant

It will help keep your operating temps consistant.

oh ok gottcha .... thank you for clearing that up ...makes sense thx alot!