I fitted a new coolant bottle to my second williams, originally it had a pink coloured coolant in that I flushed through with water then Type D coolant a few times, I then bled the system and kept topping it up with more Type D although after doing this numerous times it still keeps turning the green Type D coolant slightly off colour!! so far been through almost 15L of the stuff and i loads of water flushing it!!
anyone else experienced this? I think I will just have to get more coolant and go again!