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How would you fix this kind of rust hole?


Alexia
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This is in the LJ.  The big old rusty portion is a sandwiched piece of metal above the heat shield for the muffler.(You can see the heat shield through the small opening.)  Water collects between them and it rusts through from the bottom.  How would you fix it?

 

My process that I am thinking of:

  1. Cutting out the bad inside metal and clean loose chunks.(Done)
  2. Rusty metal treatment.
  3. POR-15 cover the outer metal from above.
  4. Adhesive body sealant the new piece and slowly weld in keeping heat low.
  5. POR-15 inside.
  6. POR-15 outside above the muffler.
  7. Top coat as appropriate.

 

RustHole-rotated.jpg

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  • 2 weeks later...
5 hours ago, Pete M said:

not sure how this thread got by me, but yes, I like your plan. :L:  

 

how do you think this spot formed?

The journey to rust seems to be a universal tale in almost every Jeep.  For those of us up north I believe it began right about the time they were ready to start bending metal for the body.  Sometimes I wonder if the last process before paint isn't a good sodium chloride bath. 

 

And I think the repair plan laid out seems solid.....(pun intended)

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Part of it is that underneath there is a piece of metal that is welded to the body that sandwiches it to provided bracing for the seat bolts.  The rolled edge allows water and debris to get up between the pieces of metal.  The left side right rear seat bolt is a spot I attempt to prevent it from rusting anymore previously.

 

I already have this all put back together and covered in excess seam sealer.

 

IMG_20200914_172058.jpg

 

IMG_20200914_172107.jpg

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