I was wondering how to change out my coolant overflow reservoir. I know that I have a crack in mine and it is causing the overflow coolant, that it is supposed to pull back in, to leak out. This keeps the coolant system about a pint shy in the filler neck when the car is cool. I just don’t like the thought that when I am running on the track my cooling system has a flaw in it. I have ordered a new one to replace it but what I really want to know is can I change it all out from under the car (the neck just pulling out from the top) or do I have to remove my intake M2 air box to get it out. Taking the air box out is such a hassle as it takes me forever to get the airpump hose and the lower turbo hose on and off. I would like to pull the overflow hose from the AST into the wheel well enough so that I could unhook and hook it up from there if I could. Is this possible? Could it possibly be this easy?

Thanks for your time.

 

Take the passenger side fender liner off.

 

This was covered here about a week or 2 ago - do a search and you will find all you need to know about the overflow tank.