C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

HELP hole in car

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Old Feb 22, 2003 | 09:38 PM
  #1  
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Default HELP hole in car

I have bad news I found a hole in the undercarige of my car. It is on the front pass. side. It is in the fiberglass just behind the metal plate. The hole is all the way through to where you can stick you finger through the interior carpet. I do have pics I just have to find them and post them. But could you guys help me find a way to repair this. :cry

Thanks
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Old Feb 22, 2003 | 09:48 PM
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Default Re: HELP hole in car (vetteguy216)

I'm assuming you're talking about broken fiberglass, not a drill hole....

When I did mine, I removed the damaged fiberglass with a dremel-type tool until I had nothing but clean edges all around the hole. You then need to grind out a "step" in the fiberglass floorpan on both the inside and outside so that you can lay the new cloth in smooth. I then laid some thin wire mesh down on the inside to provide strength, both while curing and afterwards, and then laid some fine mesh fiberglass cloth on the inside of the car first. Once that has set up, I did the same on the underside (there's nothing like working with glass on the underside of something, especially while laying on your back... :skep: ) Once it all sets up nice and hard, you can sand it down and paint it, put undercoating on it, etc, etc.
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Old Feb 22, 2003 | 09:52 PM
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Default Re: HELP hole in car (CorvetteZ51Racer)

WOW thats a good tip, maybe you should put this in the Tech Tips section as well. :thumbs:
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Old Feb 22, 2003 | 09:56 PM
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Default Re: HELP hole in car (CorvetteZ51Racer)

Thanks i'll have to try that :D But how is yours holding up?
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Old Feb 22, 2003 | 10:07 PM
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Default Re: HELP hole in car (vetteguy216)

It's holding up just fine! Remember, the floorpan from the back side of the shifter forward is fiberglass matte. Fiberglass cloth tends to be stronger than the matte, and I used cloth.
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Old Feb 23, 2003 | 05:50 PM
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Default Re: HELP hole in car (CorvetteZ51Racer)

and you will have to use a special resin that is compatable with the SMC that makes up the corvette.

They are not "fibreglass" any more. they are something called "Sheet Molded Compound". it has a built in release agent.

hence, special resin.
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Old Feb 23, 2003 | 07:00 PM
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Default Re: HELP hole in car (CorvetteZ51Racer)

Sorry I am sill learning about this stuff. But what do you mean by a "step".
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Old Feb 23, 2003 | 07:40 PM
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Default Re: HELP hole in car (vetteguy216)

You can get a fiberglass repair kit at most auto parts stores (like Pep Boys). It has the fiberglass cloth, resin, hardener, spreader tool, etc. I repaired a small crack on my floorpan that way, seems to hold up fine.
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Old Feb 23, 2003 | 08:04 PM
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Default Re: HELP hole in car (vetteguy216)

Sorry I am sill learning about this stuff. But what do you mean by a "step".
When you cut the floorpan, you'll have a uniform cross section of fiberglass. What you need to do to cut the step is grind a little bit on the top and the bottom of the edges around the hole (about 1/2-1" wide will work) where you're making that section of the section thinner....you literally have what looks like a step in the fiberglass. When you lay the new stuff in, it fills the step back up to flush with the original lines of the fiberglass.
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Old Feb 24, 2003 | 06:34 PM
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Default Re: HELP hole in car (vetteguy216)

I have the same hole in the drivers side thanks for the tip
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Old Feb 24, 2003 | 06:38 PM
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Default Re: HELP hole in car (bogus)

and you will have to use a special resin that is compatable with the SMC that makes up the corvette.

They are not "fibreglass" any more. they are something called "Sheet Molded Compound". it has a built in release agent.

hence, special resin.
not on the floor (old type hair) :nono: but definetly on the body of the car.
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