937carrera wrote: On the CV bolts I think they will be either 6mm hex or could be an 8mm spline. You should properly clean them, soak them and then use a "tapped" in bit with a socket to remove them. Allen keys are too soft, twisty and if you chew the heads up life will become difficult.
Good luck
Cheers carrera, i was trying a 6mm hex from my socket set, no spline sets to hand so i will put that on tomorrows shopping list!