[codewarrior77006]

Trying to bolt the front bumper back onto the car and realized the two top holes are missing their welded on nuts.  This wouldn't be too much of a problem except that area of the frame is a box with virtually no access to the back of the hole when the bumper shock is in place.

 

I thought about bolting on the bottom bolts (those two nuts are there) and using thick 3/8" x 1/2" diameter pop rivets for the top.  But that's not very structurally sound. 

 

There's got to be a better way.  Do ya'll have any suggestions or past experiences?

 

Thanks!

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[94SilverCab]

Hi,

 

You have 6 posts now, you might want to post a picture of the area.

 

Jay

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[Cloud9...68]

I think the O.P. is referring to this:

 

   

 

 

That is a bit of a pickle.  I wonder if you could attach a nut behind the hole using some JB Weld.  You could very carefully apply just enough JB Weld to cover the face of the nut, put it in place, and then screw a bolt from the front that you'd tighten as a means of generating the best possible bond between the nut and the bulkhead.  But you would have to be very careful not to get any of the JB Weld on the bolt threads.  Hopefully with will create a strong enough connection to be able to apply enough torque to get the bumper bar to stay put.  Maybe people with more fabrication experience could offer a better idea.  Good luck. 

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[MCL968]

I think the O.P. is referring to this:

 

Front bumper mount.JPG

 

 

That is a bit of a pickle.  I wonder if you could attach a nut behind the hole using some JB Weld.  You could very carefully apply just enough JB Weld to cover the face of the nut, put it in place, and then screw a bolt from the front that you'd tighten as a means of generating the best possible bond between the nut and the bulkhead.  But you would have to be very careful not to get any of the JB Weld on the bolt threads.  Hopefully with will create a strong enough connection to be able to apply enough torque to get the bumper bar to stay put.  Maybe people with more fabrication experience could offer a better idea.  Good luck. 

 

Cloud has a solid idea. I would also suggest drilling and tapping a piece of 1/4" flat stock and attaching it to the back of the mount with JB weld or even a couple of countersunk screws going into smaller threaded holes in the flat stock. Superstrut makes a part called a spring nut that could be JB welded or bolted into place. That would be my suggestion, assuming you have room to work.

 

https://www.lightingsupply.com/garvin-sn...gJqivD_BwE

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[Cloud9...68]

Yes, I like your idea better.

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[Waylander]

Make the hole bigger, stick a nut in the hole and weld it in place, much better idea than having some epoxy holding your crash bar on

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[codewarrior77006]

Thank you all for the great suggestions.   After careful consideration, I decided to go with a couple of rivet nuts.  The trick was finding one with the proper outer diameter.  Turns out a 3/8 nut with a 1/4 inner thread fits perfectly.  Slides snugly right into place.  Give it a good squeeze and there's a threaded hole where the blank hole used to be.   Mounted the bumper, threaded the new bolt and it cinched right up without spinning.


I was skeptical at first since the whole structure is required to hold the car as it's pulled up an incline in the event of a tow.  However, after doing the installation, I'm confident it'll hold find under those circumstances.   Below are a few photos for ya.

 



 



 

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[codewarrior77006]

Here's the final result...

 

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[Waylander]

It’s also supposed to help disperse the forces in an impact

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