Rusty Pinch Welds

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Old May 27, 2023 | 04:30 AM
  #1  
oldsguybry's Avatar
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Rusty Pinch Welds

Hello all , is there any way to stop or slow down rush in pinch welds or anywhere else it's lurking where two pieces of metal are welded together ? Like the rear quarters in particular

Thanks in advance
Old May 27, 2023 | 06:57 AM
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old greybeard's Avatar
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Fluid film? Not permanent but it stops rust
Old May 27, 2023 | 08:04 AM
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When I lived in England in the 60s, many of my friends had Land Rovers. Landies had aluminum sheet metal, which was sensitive to salt. Living near the sea, they poured a mix of grease and kerosene into the doors or anywhere there was a pinch weld. They also sprayed the undersides of their Landies with that mix.

This wasn't perfume, but it seemed to protect the bodies even if they drove them on the beach or in the seawater.

Back in the US, living in a state with lots of road salt, I adapted their ideas and sprayed AMSOil Metal Protector in sensitive parts of my Oldsmobiles. It worked perfectly in areas with little direct weather exposure, but didn't work so well on the areas of the frame subjected to sand kicked up by the tires.

Now, living in a drier part of Texas, I haven't kept up with the best techniques for avoiding rust (I did paint my frame, externally, with POR-15, though). And I used POR-15 as a primer in areas around the Vista windows.
Old May 27, 2023 | 08:51 AM
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Originally Posted by old greybeard
Fluid film? Not permanent but it stops rust
Which one ? it looks like they have more than one type .... Rust and corrosion protection , Rust prevention , and rust and corrosion inhibitor.
Old May 27, 2023 | 09:00 AM
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This any good ?
Old May 27, 2023 | 09:18 AM
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Originally Posted by oldsguybry

This any good ?
I've tried several of those rust converter products. They are all pretty much the same. If you can get it to flow in between the parts, it will deter the formation of rust.
Old May 27, 2023 | 12:00 PM
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Originally Posted by joe_padavano
I've tried several of those rust converter products. They are all pretty much the same. If you can get it to flow in between the parts, it will deter the formation of rust.
Thanks Joe 😊 , I have had the same luck . Tried Evaporust and others I can't even remember anymore . I thought there was a bead of caulk from the factory inside the trunk on the rear quarters . I'm thinking the stuff I've put in there from the past never got passed it . I remember digging the caulk out but can't remember if I got it all out

Old May 29, 2023 | 09:49 AM
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i brush painted POR 15 in the bottom of my doors and the rear quarters under the side windows and in the trunk just to help seal what i couldnt see. it dripped out in quite a few spots
Old May 29, 2023 | 11:12 AM
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oldsguybry's Avatar
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Originally Posted by stan 65 cutlass
i brush painted POR 15 in the bottom of my doors and the rear quarters under the side windows and in the trunk just to help seal what i couldnt see. it dripped out in quite a few spots
Same here , i have some POR15 myself but it didn't reach everywhere apparently because it just rusted again eventually through a different spot . I even made a dam with sanding sponges in the trunk wheel well on each side and poured it in . Keep in mind , this cars been sitting outside for the last four years ( covered in winter ) . It's going to rust obviously , but this tells me that the POR15 didn't reach everything when I poured it in there . I've tried Evaporust and had same results . I know vinegar works but it's too watery and will leak out to fast . It has to be submerged for a day or something . I found out the hard way that you don't want to leave vinegar soaked rags sitting in the rocker panel via a small hole and then forget about them for days . It literally ate a much bigger hole then what I started with . Vinegar will eat right through metal. That picture above is topped off with Quick Silver I believe

Last edited by oldsguybry; May 29, 2023 at 11:18 AM.
Old May 29, 2023 | 11:42 AM
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Unrelated but how do I post a video on this site . It keeps telling me there's a error and won't upload when I was trying to create a new thread
Old May 29, 2023 | 12:16 PM
  #11  
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This is the Fluid Film you want to use.

https://www.summitracing.com/parts/fil-cnas

I used it on my 96 98 for multi-point grounding and to protect the antenna mount and spring. The antenna mount and spring are on the trunk and there's been 0 corrosion.



You can also get it in a spray can if that will make it easier to apply. I bought the gallon bucket and it will last me forever. I only ever reapply it once or twice a year.

To post a video it would probably be easier to put it on YouTube and provide a link. It's so easy I was able to figure it out. Now all I have to do is figure out that algorithm.
Old May 29, 2023 | 12:32 PM
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Originally Posted by oldsguybry
Unrelated but how do I post a video on this site . It keeps telling me there's a error and won't upload when I was trying to create a new thread
Pay careful attention to note (1) the file is not >10MB & (2) it is a "supported" file type. Generally speaking, it's often easier to upload a video to YouTube then post the URL/link to the YouTube video.

Troubleshooting Pictures/Images
Old May 29, 2023 | 07:10 PM
  #13  
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The end goal is to get the sheet metal replaced but that may be a while . I'm just trying to prolong any further damage until I can get that done . Thanks for all your answers and ideas.
Old May 30, 2023 | 03:08 AM
  #14  
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Originally Posted by Vintage Chief
Pay careful attention to note (1) the file is not >10MB & (2) it is a "supported" file type. Generally speaking, it's often easier to upload a video to YouTube then post the URL/link to the YouTube video.

Troubleshooting Pictures/Images
It's all good on the video part ..... The video was about me trying to diagnose clicking noise that still plagues my car when I drive it . I pointed camera on my phone under car when I was driving it and it sure sounds like the u-joints on the drive shaft or something .
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