how often do you have to change the anti-freeze ? having not changed mine since owning my clio.The level is way over the max line and ive noticed a leek at the top of the bottle is it advisable to drain some out ? to under the max line how do you do this ? do i need a new cooling bottle,im new to this game and aint got a clue and how do you know if your clio is over heating has on my model has not got a temp gage ? 1.2 N reg ? please help 
