Completing The Tunnel Rail Repair
by Garage Weasel on May.27, 2021, under Chassis
Before I can continue replacing the rest of the tunnel rail, I need to patch a rusted out area on the driver side under where the Napoleon hat mounts. This damage also extends to the metal in front of the pedal cluster support plate. Rather than make a patch, I cut a section out of the tunnel from the first donor frame head. This matched perfectly. I cut out the tunnel to match the patch, drilled out several spot weld holes for the support plate, and welded the patch in on both sides. I then ground down and dressed the welds on the outside of the tunnel.
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On the passenger side, I cut out the rest of the tunnel rail out up to the front plate of the frame head. With that area cut out, you can really see the severe rust damage on the frame head. This section is longer than the frame rail pieces that I made, so I had to use part of another one and weld them together. Then I welded the piece in completely on the inside and as much as I could access on the outside. With the frame head in the way, I could only get to about 2/3 of it. I will complete the rest of outside welds when the frame head is removed. I ground down and dressed the welds on the outside on the short section from the last section welded in up to the frame head.
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This section of the driver side is shorter than the frame rail pieces that I made, due to the patch under the Napoleon hat and I was able to use the leftover piece from the passenger side. The cut-out on this section also exposes the rust damage to the frame head on this side. Just like on the passenger side, I welded this section completely on the inside of the tunnel and what was accessible on the outside. I will complete the outside as well once the frame head is removed. I also cut out the rest of the hole for the pedal cluster. I had a real sense of accomplishment with getting these 10' of tunnel rail replaced. I have once more section to replace on the curved portion of the driver side, but that will be in another post.
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Below are pictures most of the metal cut out to replace the tunnel rail on both sides. I did use some of the better metal to make a couple of patches, this is the bulk of it. Since I took these pictures later, there are pieces included of the curved section that I cut out on the driver side.
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