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Old 11-04-2008, 04:46 PM   #11
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ughhh...just was inspecting the car to track where gas smell comes from when we stop at a traffic light or the car is idling..... i was looking for the rubber hose for the emissions thing and discovered a HUGE hole in the passenger rear wheelwell. would this be the cause of the smell getting into the car? whats something I can do to seal it up for now? its not my car yet because my friend is selling it in the spring and she'* pretty much car illiterate so i get stuck with all the repairs to keep it nice until I buy it. i was thinking some expanding foam and air duct insulation sheeting? whatcha think for a quick fix? when i buy it i'd most likely patch it with some sheet metal and rubber coating....
Quick Fix? If you can get some exterior adhesive, some sheet metal large enough to cover the spot, and some sprat on bedliner, you can do it pretty quick.

just clean the area for dirt and let it dry. Then use the adhesive to hold the sheet metal on and seal it so water doesn't come in, then spray it with the spray on bedliner/rubberized coating to help keep the new piece from rusting.
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Old 12-16-2014, 01:49 AM   #12
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The right side wheel wells usually go bad first because they usually get blasted worse by the big puddles by the curb.

Those pictures above bring back memories of fun times - (needs another post)
Does anyone know the underlying cause of why this is happening? My 97 i didnt notice till it was a hole. I have a 99 i bought from the south and started chipping away the heavy layers of cracked undercoating to expose a rust spot about 1 foot by 2 foot. Same side, the right rear inner fender well on top. Im hoping to do some blasting, throw on some POR 15 and undercoat with 3M Body Schutz Coating. Is there and underlying cause that needs to be corrected?
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Old 12-16-2014, 08:16 AM   #13
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If you've noticed, most roads crown in the middle and pitch to the right. Just like water, sand and gravel migrate from the middle, to the right side of the road. Your right side tires pick up the gravel and sand and like a sand blaster, removes paint from the underside.
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Old 12-16-2014, 08:36 AM   #14
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the post 2000 cars have plastic inner fender guards, you could get them and retrofit them to an older car for an extra layer of protection. just have to put a extra coating on the inside of the outer fender, they like to rust were the crud piles up were the two meet
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Old 12-16-2014, 01:10 PM   #15
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If you've noticed, most roads crown in the middle and pitch to the right. Just like water, sand and gravel migrate from the middle, to the right side of the road. Your right side tires pick up the gravel and sand and like a sand blaster, removes paint from the underside.
this is the only car i have owned that ever did this Mike.(97-99 Bonny) And to make an underlying issue more suspect, only the right side rear had all this extra undercoating slapped up inside the wheel well. The left side looked normal and is intact. The right side with all the extra undercoating had large cracks everywhere. I just havent noticed this on other cars i`ve owned or worked on,,,,,
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Old 12-16-2014, 08:34 PM   #16
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My 97 is doing the same thing. Matter of factly, I have a nice hole in the RHS rear wheel well going into the trunk.
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Old 12-16-2014, 09:01 PM   #17
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My 97 is doing the same thing. Matter of factly, I have a nice hole in the RHS rear wheel well going into the trunk.
I'm going to clean and sandblast the area and apply KBS Sealer also can use POR15 and then undercoat as I had intended. I spoke to my bodyshop guy today and he said he sees it all the time on those years and it'* usually the pass side rear. I'm gonna do my best to halt the process.
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Old 12-17-2014, 02:05 AM   #18
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this is the only car i have owned that ever did this Mike.(97-99 Bonny) And to make an underlying issue more suspect, only the right side rear had all this extra undercoating slapped up inside the wheel well. The left side looked normal and is intact. The right side with all the extra undercoating had large cracks everywhere. I just havent noticed this on other cars i`ve owned or worked on,,,,,
mike,,,, i sand blasted the whole area and found a few pinholes so i feel fortunate. im gonna patch the pinholes and cover the area with POR 15 then undercoat with 3M Body Schutz.
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Old 12-18-2014, 02:41 AM   #19
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If you've noticed, most roads crown in the middle and pitch to the right. Just like water, sand and gravel migrate from the middle, to the right side of the road. Your right side tires pick up the gravel and sand and like a sand blaster, removes paint from the underside.
after thorough investigation into this Mike, i have concluded it was GM quality control that is to blame. The inner well on each rear side are from different forms. They are different and the stamped GM number on each panel is different. I grinded and sandblasted both inner wells and found metal deterioration on the right upper. The left looked beautiful. All factory undercoating is what i removed. So,,, GM knew they had an issue and just tried to pile on more undercoating hoping the defective metal on the right panel would hold up. Oh well,,cant cuss out GM now,,,,tool late
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Old 12-18-2014, 08:39 AM   #20
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Of course the panels are going to have different part numbers. This is how they differentiate between LHS and RHS parts.
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