View Single Post
      06-04-2012, 04:30 AM   #24
Kind of a big deal

Drives: an 1M not often enough
Join Date: Jan 2011
Location: between Unlimited and Hard to Get

iTrader: (0)

Originally Posted by Waldo23 View Post
The 3 roof bars are new. Picture below shows why. A BMW approved panel shop put the roof on. The process is lining it up and using a glue and rivots.
Some additional photos of the joins for you, one internal and other looking down on the joint between roof panel and frame going between a pillar to c pillar. The screw hole section is for roof rack mounts. On the lips were the glass will cover you can see the rivot points, no photo but can post one if you like.
Considering some (non accident related) roof work myself, so thx for posting!

Are the rivots, you are mentioning these mechanical fasteners applied with a sort of pier, that sheers of the application rod? (ie not spotwelded?). Would indeed be interested to see one or more rivot point(s) in detail.

Was the stock roof only glued or also with welds or rivots? How about the new roof is that glued only or glue and rivots?

For strength reasons I would expect that generally spot welds are preferable, (certainly for the beams) but in your case the cage is probably all the strength you ever need, so wondering if the choices made by your body shop can be transferred to a general 'no cage' situation?