I don't think there is a way to remove the rivet nut once it's bulged to the point it won't come out by itself. It looks like this now, and I don't think you can un-do that bulge. Maybe if you thread in a bolt and hammer it up? I wouldn't try that on my own vehicle.

The only solution is to fully set it in place. The best way to do that is with a rivet nut tool. Might need to start calling some auto shops in your area.

 

see post # 10 below about removal. I would try to set the rivnut before trying removal.

http://www.piloteers.org/forums/82-...14-pilot/30560-doh-diy-running-board-install-gone-wrong-stripped-rivet-nut.html

more help in #13, ... this thread about riv nut instal :
http://www.piloteers.org/forums/70-2009-2011-pilot/22209-my-pilot-w-premium-running-boards.html

 

This is the actual condition of the Rivet nut. Threads are ok inside the Rivetnut.
Its just not tight.

I am going to try the second link provided RSQ

 

ooo...fixed it...

Gap yesterday left over work as shown in the picture above is about 1/8"

I took a chance as mentioned by RSQ.

Used the Same Bolt
M8 X 1.25 X 40mm

Solution I tried and working ( SO FAR ,,,will give feedback after 1 month )

1. Rivet nut installed is loose by 1/8" from frame of the body
2. Inserted Flat washer on the M 8 X 1.25 X 40 mm Bolt
3. Inserted M 8 X 1.25 Nut over Flat Washer
4. Inserted Flat Washer over M 8 X 1.25 Nut
5. Inserted the assembly bolt to the Rivet nut installed already
6. Holding the Bolt with Wrench and Started tightening the Nut , Rivet started spinning with nut. Kept on going little bit, some point - Nut Started Tightening- Pushed the Rivet nut all the way in
7. Tightened the BOLT - roughly about 2 turns
8. Unscrewed the Bolt - by holding the Nut - It will be a real tough to get it out by holding nut - kept on going. Everything came out -
Rivet Nut is TIGHT...

Finished the Installation.....

Adios....

 

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