172 rear exhaust heatshield

[coverman]

How is these parts fastened to the bodyshell? Cursory glance(exhaust was still too hot to delve in detail) whilst car on lift during MOT seems that they have broken free from a stud welded to the shell. Is that a threaded stud, and if so what size thread please?

 

[Commie VID]

I had something similar, where it looked like the stud itself had disappeared. What I used was a self tapping screw, No.12 (~5.5mm) and some clips designed for heatshields, which I got from Renault. It kinda just screws onto the stud. Part number 77 03 080 115.
Given the fit was pretty good, I would guess that No.12 is the size for all the welded studs.

 

[levaz]

I pulled mine out altogether lol

 

[leeds2592]

Also once you've got a nut, put a massive washer on before putting the nut on. Had to do this with mine as there was a hole in it around the nut so even though the nut was tight it wasn't holding the heat shield in place.