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Glass collapsed seat mount

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Old Apr 24, 2024 | 04:24 PM
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Default Glass collapsed seat mount

Greetz All,

it seems one of mounting brackets on seat has cracked and collapsed.






Any advice on how to fix this ??

MTIADC3
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Old Apr 24, 2024 | 05:17 PM
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If that's the nut plate the seat tracks bolt to then that's pretty scary. In an accident the seat could or worse would become loose! I don't think I would just glass that back together, but instead I think I would be looking at trying to make some kind of larger plate to cover much of that area of the floor and rivet it in place.
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Old Apr 24, 2024 | 07:05 PM
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Wow! Now that looks scary! Looks like pull the carpet and underlay. Grind it out really good. Re glass, reinforce as mentioned above, and more glass over the top of that. Reattaching that nut plate when done through the reinforcement and the new glass of course. Doesn't look to bad when you think about it.
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Old Apr 24, 2024 | 07:06 PM
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that plate he speaks of needso tbe on the outside so if the car does get into an accident it is trying to pull that new plate through the floor and not just out of the rivets in the floor
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Old Apr 24, 2024 | 09:18 PM
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And I was thinking of plating it on the inside so the seat doesn't go through the floor when you hit a nasty bump!
Perhaps both.
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Old Apr 25, 2024 | 05:25 AM
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Originally Posted by 4-vettes
And I was thinking of plating it on the inside so the seat doesn't go through the floor when you hit a nasty bump!
Perhaps both.
Yes a sandwich is a better idea
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Old Apr 25, 2024 | 03:07 PM
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Somebody used to make a metal plates that goes down there to re-enforce the fiberglass.
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Old Apr 25, 2024 | 04:41 PM
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Maybe. But it certainly wouldn't be hard to make up a couple yourself. Doesn't look like anything you would have to buy, other than maybe some steel plate.
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Old Apr 26, 2024 | 02:36 AM
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Originally Posted by 4-vettes
Maybe. But it certainly wouldn't be hard to make up a couple yourself. Doesn't look like anything you would have to buy, other than maybe some steel plate.
I have some steel plate - will glass around and to it ?
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Old Apr 26, 2024 | 03:31 AM
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Put one plate under. One over. Grind the bottom off lightly to get a rough and clean surface. But don't go very deep. A layer of cloth and resin, press plate into place. Predrilled of course. A couple more layers of glass and resin over it. 3 or 4. Grind out the top. Go deeper around the crack. Same drill. Maybe a couple layers before the plate. Glass over it to get it smooth enough.
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Old Apr 26, 2024 | 05:41 AM
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Originally Posted by 4-vettes
Put one plate under. One over. Grind the bottom off lightly to get a rough and clean surface. But don't go very deep. A layer of cloth and resin, press plate into place. Predrilled of course. A couple more layers of glass and resin over it. 3 or 4. Grind out the top. Go deeper around the crack. Same drill. Maybe a couple layers before the plate. Glass over it to get it smooth enough.
Tremendous. Thanks !!
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Old Apr 26, 2024 | 06:14 AM
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Fix it first without the plates so it's no longer cracked. Then put the plates on. The are there to reinforce the floor and make it stronger. It should be 50% bigger than the repair area so it's bridginging the crack and adding strength across the area. You can either glass them in smooth or not. Unless they are buried in the glass, smoothing the area won't add strength but it will help keep the carpet smooth and the seat feet even
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Old Apr 26, 2024 | 06:50 AM
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I wrote that in a hurry. Absolutely correct. I guess thats what I ment by smooth enough. Doesn't need to be perfect up top because it's under the seat. But smooth enough the seat sits flat.
I'd be glassing in that crack from above. That's why I said grind it out deaper on the top. I guess I would be plating and glassing the crack in one go. The key here is to use the correct resin to match the glass in the floor. I have a fibreglass expert here in Queensland I talk with when I need to make repairs. He tells me what I need. Then off to the boat supply place to get the right stuff. Different types of fibreglass need different resins and epoxies to make a good repair.
Different years of C3's have different types of fibreglass panels. Some years, around 72-73 I think use some of each. You need to do your homework to make certain your using the right stuff. Polyester resins in those DIY kits at the local auto parts stores are generally NOT acceptable.
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