so i am going to be doing my headgasket, and i work for bmw, but i know special volvo tools are needed, the cam alignment tools are a must, but i was told i need a tool for a valve seat seal? and a valve cover removal tool. any body framiliar with this? also any idea where i can get the tools, and or borrow them from? or any substitutions, because i think a universal cam locking tool will work fine, but i am not sure about the others.