Floor Pan Rust
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Junior Member
Joined: Dec 2012
Posts: 87
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From: Iowa
Car: 1988 Gray Iroc
Engine: 305 TPI
Floor Pan Rust
Hi all,
I am rebuilding a 1985 Iroc. Yesterday, I took out the carpet to find major rust outs in the front of the drivers side and passenger side floorpans. On the drivers side, It looks as if the subframe has some rust outs. Keep in mind that I am a high school student, so cash is tight for me. Do you guys think a problem this large is repairable? I am mainly worried about the rust outs in the subframe, as this is a pretty key structural area.
I am rebuilding a 1985 Iroc. Yesterday, I took out the carpet to find major rust outs in the front of the drivers side and passenger side floorpans. On the drivers side, It looks as if the subframe has some rust outs. Keep in mind that I am a high school student, so cash is tight for me. Do you guys think a problem this large is repairable? I am mainly worried about the rust outs in the subframe, as this is a pretty key structural area.
Supreme Member

Joined: Dec 2012
Posts: 1,356
Likes: 15
From: northern VA
Car: 88 Sport Coupe Camaro
Engine: V6 2.8
Transmission: Borg-Warner T-5
Axle/Gears: RPO/GU6: 3.42
Re: Floor Pan Rust
Anything can be repaired.
A Camaro cabin is nothing but a sheet-metal box. Yours has holes in it. It is now your job to find ALL the holes, and patch them one-by-one.
If the source of the leak that rotted your floorboards is a rotten firewall between the cowl and the interior face of the firewall, you have quite the job on your hands.
You can test for this by blasting water into the cowl screen. If puddles form in your floorboards, you will have just discovered the Achilles heel of Third Gen rust-rot remediation. You will spend many days fixing that one. AMHIK.
A Camaro cabin is nothing but a sheet-metal box. Yours has holes in it. It is now your job to find ALL the holes, and patch them one-by-one.
If the source of the leak that rotted your floorboards is a rotten firewall between the cowl and the interior face of the firewall, you have quite the job on your hands.
You can test for this by blasting water into the cowl screen. If puddles form in your floorboards, you will have just discovered the Achilles heel of Third Gen rust-rot remediation. You will spend many days fixing that one. AMHIK.
Re: Floor Pan Rust
Use imgur if you want to upload pics. I had major rust, and I'm repairing it as I type (I actually just returned from getting sheet metal, and about to go work in a few mins). If you need to patch up floors, just go to a junkyard and either cut it out yourself or ask them to do it for you. I got the whole floor for about $200, and they took it out for me and loaded it into a mendards rental car (it will fit into a pickup), only if menards knew... haha. But yeah, or you can cut out patches. You may also want to consider getting a whole new shell. But if you want to learn about restoring, you could just fix it yourself.
Also what's necessary is a gas mig welder. Don't do flux, it sucks on bodywork, it will burn through anything thinner than 16 gauge, yep.
I did fenders, quarter panels, rockers, and doing floors on my car, so I got a lot of experience with it. Got any questions, just ask.
And the subframe... Well, my floors were rotted through that you can flintstone the with two people in the driver area. (both sides were equally rotted out). And subframes were fine with a bit of wirebrushing (except the back ones, which I wirebrushed, fixed up a bit, and protected them, maybe a bit too much too, then again you cannot overdo protection, except in other cases, if you know what I mean. Either way, you should be good.
And if you're still in highschool, at least you will start on it fast, I got mine right out of highschool, now its almost 2 years later, and I'm fixing it up (though, I was piled with college work and shieeeet) but over breaks and summer (right now) I'm doing massive amounts of work.
Either way, questions, just ask, and good luck.
By the way when you're doing patches, cut out all the rust, get cut out floor pans, fit them over it and spray paint with some paint from underneath to get a perfect cutout. Did that with mine, and without looking up very close, no one can tell the floors were replaced.
Also what's necessary is a gas mig welder. Don't do flux, it sucks on bodywork, it will burn through anything thinner than 16 gauge, yep.
I did fenders, quarter panels, rockers, and doing floors on my car, so I got a lot of experience with it. Got any questions, just ask.
And the subframe... Well, my floors were rotted through that you can flintstone the with two people in the driver area. (both sides were equally rotted out). And subframes were fine with a bit of wirebrushing (except the back ones, which I wirebrushed, fixed up a bit, and protected them, maybe a bit too much too, then again you cannot overdo protection, except in other cases, if you know what I mean. Either way, you should be good.
And if you're still in highschool, at least you will start on it fast, I got mine right out of highschool, now its almost 2 years later, and I'm fixing it up (though, I was piled with college work and shieeeet) but over breaks and summer (right now) I'm doing massive amounts of work.
Either way, questions, just ask, and good luck.
By the way when you're doing patches, cut out all the rust, get cut out floor pans, fit them over it and spray paint with some paint from underneath to get a perfect cutout. Did that with mine, and without looking up very close, no one can tell the floors were replaced.
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