I need to take the EGR off and clean the (likely) blocked passage. Also took the TB off (clean it while at it), ditto fuel rail and injectors (want to replace the O rings).

I want to take the upper intake off as well. Is just the very upper part coming off (but held by at least the 'upside down' screws in the front). Or do I take the whole off (which bolts have to come off, what needs to be disconnected?)