Is it normal to f**k up the gasket when replacing the spark plug??have been told when changing the plug will easily f**k everything up as needed to take out the whole stuff out?? mine is a MK2 Clio 172... been ran for 40,000km and i am now thinking to replace the plug...those garage seems no so familiar in french car.. and told its so trouble to replace the plub...~.~ did anyone ever break their stuff when replacing it???