R100 instrument cluster plastic

[pioppiny_81]

Restoring my ride I have to face a new challenge:
repair the internal columns of the instruments cluster , those that serve as housing for the 3x15 self threading screws. They are all cracked

column.jpg (555.76 KiB) Viewed 1192 times

First of all I would like to ask what type of plastic the cluster is done in your opinion, cause I need to reinforce the columns with
a bi-component glue but looking around I see there are a lot of different types

and second question is:
can I put M3 threaded copper inserts instead self threading screws? Have any of you already did it?

thank you all!

[Kurt in S.A.]

This MOA poster had an interesting idea:

https://forums.bmwmoa.org/showthread.ph ... ost1285750

Kurt

[pioppiny_81]

yes I had already thought of a similar solution with plastic tubes, but I also ave to fill the old holes with something and made new grooves to install threaded inserts, I dont' think Ciano Acrylate glue is the best for that.

[pioppiny_81]

Finally I've fixed the columns of my istrument cluster, I used threaded M3 inserts, heat inserted using the tip of a circuit welder
before I prepared the holes with increasing diameter drill bits (from 2mm to 4)
after the inserts I reinforced every single column with epoxy 2k glue mixed with crumbled scissors cutted glass fibre
The photo is before I refined all with the dremel:

strumenti.jpg (1.29 MiB) Viewed 1053 times

Glue seems to have a good superficial hardness and tenacity at the same time,
only time will give us a response