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Fixing Carbon Fiber Hood?

 
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Old 11-08-2014, 11:27 PM
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Fixing Carbon Fiber Hood?

I'm looking into purchasing a carbon fiber hood for my 4th gen.
The issue I'm looking at with this particular hood, is it had holes set up for hood pins.

I was wondering if there is a way to cover the holes up properly?

From the research I've done, carbon fiber hoods are fiberglass with a layer of carbon fiber, one forum said to fill the holes with epoxy and wrap with carbon fiber again? If that is true I would just like a second opinion.

Pics of the hood below.
sidenote- the reason I'm looking at this hood vs. getting one without that damage, is it would be coming over as a package deal, which once i sell everything else, the hood would be practically free.

Thanks in advance.

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Old 11-09-2014, 09:31 PM
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Re: Fixing Carbon Fiber Hood?

The holes can be patched, however if you intend to keep the cf look - it will never flow or match up with the pattern.

If you are getting it for weight reduction - patch and paint match the hood. (or install decent hoodpins if the holes align up for it)
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Old 11-09-2014, 10:34 PM
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Re: Fixing Carbon Fiber Hood?

No way to keep that cf look at all?
Im buying it mainly for the light weight, but i also like the look of cf.
Best research i found was filling the holes with black epoxy.
Is that a reasonable fix? I know epoxy wouldnt look exactly like cf, but would those small holes be very noticable?

The hood pins look kind of high, but he said it mounted to the radiator support
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Old 11-10-2014, 08:28 AM
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Re: Fixing Carbon Fiber Hood?

Good luck for Carbon Fiber Fixing.


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Old 11-10-2014, 11:03 AM
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Re: Fixing Carbon Fiber Hood?

Like patching a hole in wood, you can get close. Say you cut a segment in a square and match the pattern as close as possible, then cut that to fit for your 'patch'. But fade-age of the old hood will also play a roll.

Now keep in mind those cf hoods don't close all perfect like the heavy metal. Part is the light weight and part is the shape. It will likely 'flap' some at speed too. That's why many remove the hood latch and use pins to hold it down.

Like Wings said, consider using pins on your car.
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Old 11-10-2014, 01:07 PM
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Re: Fixing Carbon Fiber Hood?

I've considered it, and i would have no problem doing so, but what's your opinions on the holes? Don't they look like they are to high for the radiator support?
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Old 11-10-2014, 10:38 PM
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Re: Fixing Carbon Fiber Hood?

Can you go look at it or request photos of where his pins were? measurements? I can't say how far it looks since I own a 5th, not a 4th.


I just know first hand about how impossible it is to patch cf and make it un-noticeable when not painted

filling is your best bet if you go that route - but it'll still be noticeable





I'm one of the crazy ones that cut giant holes in a brand new hood a day after owning it. (aerocatch pins)
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Old 11-15-2014, 11:38 AM
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Re: Fixing Carbon Fiber Hood?

yes, but the guy leaves the state, it seems every other week lol, so who knows when I'll actually see it in person.
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Old 11-26-2014, 02:16 AM
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Re: Fixing Carbon Fiber Hood?

I have done this several times on the race cars as we occasionally have a bump with other cars. Traditional fiberglass and Carbon fiber are essentially the same thing with different fibers. The carbon fibers are stronger and lighter than glass fibers and much more expensive (about 4 times). All you have to do is mix up some resin, coat the back of the holes inside the hood and lay a small patch over the hole again on the inside and coat it with resin too. The patch can be fiberglass or carbon fiber. That small area is not going to matter as far as strength or weight so just use fiberglass unless you have a piece of carbon fiber laying around. You might want to put some resin on the top of the hood over the hole as well. Then after it dries just sand off the patch over the hole until it is smooth. If there are any pits just add some more resin and sand again.

I like to use the fiberglass resin gel. The normal resin is very thin and likes to flow more like paint. The gel product is more of a paste and will stay put better. You can fill small holes and cracks with the gel without any fibers at all if you want. Actually I just used a product last week that is fiberglass resin gel with fibers mixed into the gel. It's a little hard to work with but makes for a strong patch. By the way, you only have about 10 minutes to get it all in place before it starts to harden so work fast.

I use the same technique to fill Honda rot over the rear wheels. I have done patches as big as 3" by 8" by just laying a gel saturated piece of fiberglass over the hole from the inside and sand it smooth. If there are any holes just put some more resin gel in and sand it. Actually I like to use glass & resin for the base then fill the pits and valleys with bondo which makes for a smoother surface after sanding.

Try it, it's so easy.

Of course this all means the CF "look" will be gone where the patch is. Of course you can paint it if you want.

Oh, I have always got my resin gel at CarQuest but any car paint store should have it
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