Rust in passenger side floor board
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Posting Guru
Joined: Jul 2004
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From: East Tn
Rust in passenger side floor board
I pulled the carpet out of the old girl yesterday. The floor boards really surprised me they are about 85% rust free. There is 2 rust holes though. My question is should I cut the rust out and replace it or sand it down, spray weld through primer on it and weld over it. I think option #1 is the right way to do it, but I think #2 would be stronger. Any ideas?
Elder User
Joined: Dec 2007
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Couple of detail items. I'd suggest crawling under the truck and inspect the floor pan area where the rust is. You may have a couple of rust holes that appear to have started in the cab itself, but it's also possible the rust started on the outside metal, and had lunch until you found the holes.
If the underside is decent, you can wirebrush off any loose rust and treat the area with rust converter spray or some such product. Normally cutting out the rusted area and replacing the metal is what I would suggest. (I'm not a welder, so I have no clue as to 'spray welding', sorry) With our 75' they riveted in sheet metal floor pans, but they forgot to treat the rust, and it nailed the cab mounts at the front--so I'm going to have to learn how to weld correctly to repair that section.
This is pretty much just treating the existing rust, filling the holes using a method you feel comfortable with, and I'd give everything a coat of rust prevention treatment to ensure this won't be a problem anytime soon again. Considering the problems we see with ours that needs attention? I'd urge getting under the cab and making sure there isn't a bigger problem starting up.
Sorry if this is not of more help, but it's the best I can think of.
S-
If the underside is decent, you can wirebrush off any loose rust and treat the area with rust converter spray or some such product. Normally cutting out the rusted area and replacing the metal is what I would suggest. (I'm not a welder, so I have no clue as to 'spray welding', sorry) With our 75' they riveted in sheet metal floor pans, but they forgot to treat the rust, and it nailed the cab mounts at the front--so I'm going to have to learn how to weld correctly to repair that section.
This is pretty much just treating the existing rust, filling the holes using a method you feel comfortable with, and I'd give everything a coat of rust prevention treatment to ensure this won't be a problem anytime soon again. Considering the problems we see with ours that needs attention? I'd urge getting under the cab and making sure there isn't a bigger problem starting up.
Sorry if this is not of more help, but it's the best I can think of.
S-
Post Fiend
Joined: Jan 2006
Posts: 5,037
Likes: 9
From: Kasson, Minnesota
I would cut out and replace. If there are some holes, than the metal has become very thin. To make it easy, cut it out, overlap some new metal about a 1/4 to 3/8 inch, weld, put some seam sealer on it, paint it, carpet. I will be even better if the rust doesn't extend up to the cab mount.
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