Radiator cap removal
I've a slow leak of coolant. The repair shop suggested changing the radiator cap, so I bought a new one. The old cap will turn counter clockwise (but only with the help of a very large plumbers vise grip) and loosen, but will not come off. Is there a special tool for removing the cap? Should I tighten it back and pay a professional to do the cap replacement? Thanks if someone will help me with this. 2005 R50, not S model. I read the post by dakini below "need help disecting coolant problem" and it was very helpfull, but I still need to replace the radiator cap with the new one.