Blower box 3,6er: Which parts?

Hello.

after the 3.6 pre-rev blower box and the one of the 20V are identical, I'm about to penetrate you with the following question: Which parts OUT OF the heat exchanger and the blower motor are best to be exchanged immediately when you have pulled the cattle out? Any unaccessible hoses and other parts? I think a body glue is needed for reinstallation, right? Anything else?

I still have the problem, that my error memory is "clean", but the air distribution center/top/bottom seems to be more willing to take place. Of course, this can also be because of the dying fan motor, but more likely hangers appear to me. If you like to break something, should you change it proforma, do you even get parts?

Thank you for your help

Bastian