Extension of EGR/AGR valve 1.5 dCi

Hello, I’m looking for a guide for the expansion of the EGR/AGR valve with a Juke 1.5 dCi. Has someone already muddled this or does someone have a guide? I suspect the valve is strongly coked and would like to clean it. Only with cleaner spray it might be too uncertain for me because I may not be able to spray everything properly (the way is quite long). I’m open for tips. Thanks and greeting rubi