Greetings Friend, I suspect that you suddenly took into account the blocking of the camshaft pinion that has a system that minimizes the sound between the two pine nuts, so that you understand me better it is the one that seems to have two pine nuts, within these there is a spring, you must turn a part of the pinion against the other until they coins some gaps where an 8m tormillo is put in the 8m tormillo when it Before disassembling it, now - if this is the case - you would disassemble the camshaft and do the procedure I told you before. I hope I have helped you .... Please tell me how reparation is doing. thank you.