Valvetronic BMW E46

Good morning my question is the following I have a loss of oil because of the electric motor of the Valvetronic Motor type N42 is a compact e46 of 2002 316ti, because the question is the next one I do not know if you have to peel the distribution to dismant For the position of the eccentric tree, but it is the first time I deal with this system if anyone knows and can guide me I appreciate it a greeting