it was for sound insulation.
Unless you had a fire under that hood, no way engine heat would damage it.
Hood Heat Damage
Thread Starter
Le Mans Master
Joined: May 2008
Posts: 9,063
Likes: 2,736
2022 C3 of the Year Finalist - Modified
Hood Heat Damage
On my 77, factory installed that nasty hood insulation on the inside. Mine was falling apart, so I removed it. Local Corvette expert told me that without it the hood can start showing signs of heat damage / warping. And my hood is NOT perfect, does have some waviness to it and it needs block sanded to make it wave free. But I am not sure it has anything to do with the missing insulation. Lots of earlier cars were built without this insulation. SO, what are your thoughts?
Thread Starter
Le Mans Master
Joined: May 2008
Posts: 9,063
Likes: 2,736
2022 C3 of the Year Finalist - Modified
Thanks for the input, seems like the majority of you say the insulation is for sound. I got one saying its for heat. In any case, I am not installing it.
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mike...
Burning Brakes
Joined: Jun 2009
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From: Syracuse IN
Melting Slicks
Joined: Mar 2002
Posts: 2,164
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From: Beringen
Think about it. There is no rubber moulding preventing sound from migrating throug the side of the hood or from the underside. Why in hell would they put sound deadner on the hood ...
Melting Slicks
Joined: Dec 2008
Posts: 2,070
Likes: 5
From: N.Richland Hills Texas
Here's something else to consider... Not that the factory did though ... Several friends have chrome air cleaner covers... At a car show, with the sun just right, it has "burned" the underside of the hood, discolored the paint ect... But I don't have the blanket either....
Team Owner
Joined: Jun 2000
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From: Southbound
Cruise-In II Veteran
The insulation was added in order to meet drive by sound level requirements. It is not for underhood heat. AC compresssor oil sometimes splashes the underside of the hood and will eventually work through the fiberglass and raise paint.
Last edited by Easy Mike; Jun 9, 2013 at 09:24 AM.
Melting Slicks
Joined: Mar 2006
Posts: 2,248
Likes: 67
From: Warrington PA
Finalist 2020 C4 of the Year - Unmodified
that is one of the best I have ever heard.........
The 74 has one, the 82 doesn't.....as far as heat damage goes.......that is all BS....big time, your paint has to be in really bad shape to start with for heat damage to occur....I have always been in the habit of opening my hood whenever parked in the garage to let the heat escape...and I always wipe down the top surfaces of the Vette whenever I come in from a rain storm....that way you will never and I specify never have water spots, especially on the hood if you take the time and do these simple steps.......I hate WATERSPOTS, because they are a real PIA to remove......
Race Director
Joined: Jul 2001
Posts: 15,892
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Guess we will be seeing you posting here in a couple of months that your paint started to peel off.
Think about it. There is no rubber moulding preventing sound from migrating throug the side of the hood or from the underside. Why in hell would they put sound deadner on the hood ...
Think about it. There is no rubber moulding preventing sound from migrating throug the side of the hood or from the underside. Why in hell would they put sound deadner on the hood ...
None whatsoever on '68 and earlier.
How do you explain this?
Thread Starter
Le Mans Master
Joined: May 2008
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2022 C3 of the Year Finalist - Modified
Guess we will be seeing you posting here in a couple of months that your paint started to peel off.
Think about it. There is no rubber moulding preventing sound from migrating throug the side of the hood or from the underside. Why in hell would they put sound deadner on the hood ...
Think about it. There is no rubber moulding preventing sound from migrating throug the side of the hood or from the underside. Why in hell would they put sound deadner on the hood ...
Melting Slicks
Joined: Mar 2002
Posts: 2,164
Likes: 7
From: Beringen
Ever checked thermostat rating differences between the years. With the advert of emission controls they went to higher engine temps.
I'm not going to debate this. Do whatever you feel you need to do on your car.
I'm not going to debate this. Do whatever you feel you need to do on your car.
Last edited by Belgian1979vette; Jun 9, 2013 at 11:55 AM.
Instructor
Joined: Sep 2008
Posts: 216
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From: Eugene OR
Just my experience, but here's my $.02...
My '72 came to me without an air cleaner and some mentally challenged previous owner had the timing retarded (no pun intended) to the point where the engine sounded lopey. This made for lots of backfires and therefore the bubbly paint right over the carb on my hood.
So there ya' have it. If you shoot flames out of the carb under the hood regularly on a car that didn't have insulation you CAN damage the paint.
On the other hand... You have to be pretty stupid for it to go that far.
My '72 came to me without an air cleaner and some mentally challenged previous owner had the timing retarded (no pun intended) to the point where the engine sounded lopey. This made for lots of backfires and therefore the bubbly paint right over the carb on my hood.
So there ya' have it. If you shoot flames out of the carb under the hood regularly on a car that didn't have insulation you CAN damage the paint.
On the other hand... You have to be pretty stupid for it to go that far.