My girlfriend has a 1995 325i with the 6 cylinder. The valve cover gasket is leaking and the shop she has it at right now wants to charge her $250 to replace it and is telling her it's 'urgent'. I called the dealership and they say it's not urgent, which is what I thoght. Anyway, has anyone here ever replace the valve cover gasket on one of these? If so, how hard is it to do? Any special tools?