Hi,
thanks to 986 Ron for this thread and others like Pedros garage, i managed to change the coolant tank my self, it was PITA to work at the engine compartment.....
Did get the clamp plier tool, but it cracked on me the first try, so i managed to use needlenose pliers With a bit of luck...so a tip, don't buy cheap ebay tools and get a quality one instead.
Thanks to this forum and i'll hope none of you gonna work on the coolant reservoir in the future....