I have disassembled my engine and one valve was bend. Now I am about to reestablish the engine again and I was asking myself why these stupid engineers did not make anything to safe the valves ?!!?. Anyway it had only 5000 km at back

Now I am trying to adjust the valve shims. Please if anyone have some tips let him say (I have no any Renault special tool).
Thanx,
Ivo
Bulgaria