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Radiator seal position

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Old Apr 3, 2023 | 07:26 PM
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Default Radiator seal position

Does this rad support-to-hood seal look like it’s in the right position?
I seems to be putting a lot of pressure on the hood and causing the front lip of the hood to stand proud of the surround.


(I know I’m missing a piece between rad and rad support, need to get that one.)
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Old Apr 3, 2023 | 09:30 PM
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The center is kinda far forward. On original cars that piece often partially covers the two shroud bracket attaching bolts.
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Old Apr 3, 2023 | 11:23 PM
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I need to install the top foam on my '72 and have held off due to not knowing placement.
Placement pics would be fantastic.
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Old Apr 4, 2023 | 07:57 AM
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Check out the pics in post #9 by PJO
https://www.corvetteforum.com/forums/c3-tech-performance/4516433-early-69-350-350-radiator-seal
You might want to change to a 3 piece seal. Here is a pic of Alan's base 71


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Old Apr 4, 2023 | 09:56 AM
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Originally Posted by BKarol
Check out the pics in post #9 by PJO
https://www.corvetteforum.com/forums/c3-tech-performance/4516433-early-69-350-350-radiator-seal
You might want to change to a 3 piece seal. Here is a pic of Alan's base 71
Thanks.
The one-piece seal is correct, at least for my car, and is self-adhesive -- meaning that, unfortunately, there are no locating pins to use. It's such a long piece of foam with ears, it's difficult to know where it's supposed to lie.
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Old Apr 4, 2023 | 12:00 PM
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Are you sure that’s the correct seal, too me that looks like a seal for a big block hood.
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Old Apr 4, 2023 | 12:08 PM
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With all the talk about the benefits of getting cold air to your carb, would that be counter productive?
Does your engine run hot, requiring more air forced through the radiator? Or for originality, etc.?
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Old Apr 4, 2023 | 01:31 PM
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Mine does not run hot at all; quite the opposite, it takes a while to get to operating temp. So I’m leery about removing it. It was put on by a previous owner. I recently repaired one of the hood hinges and took a ton of slop out of it and now when I close the hood it seems like it’s holding tighter against the foam seal and pushing up on the front of the hood.
According to Doc rebuild site, ‘71 350 with A/C would have the one piece.
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Old Apr 4, 2023 | 03:47 PM
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Good post and I'd like to know if there is a part number for that upper radiator to hood seal for my 78??
Tried a few vendors but nada!!!
Any suggestions would be helpful!!!

JJ78
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Old Apr 4, 2023 | 05:02 PM
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Originally Posted by JavaJolt78
Good post and I'd like to know if there is a part number for that upper radiator to hood seal for my 78??
Tried a few vendors but nada!!!
Any suggestions would be helpful!!!

JJ78
So to answer your question a direct hood seal...No
You have a cold air intake on your 78.
However, there is a seal that fits under your plastic cold air intake extension.
"IF" you have both L&R #4 seals in this drawing you can purchase #2 seal separately, GM original #379975 was superseded to #14016160
The 14016160 seal is a cut to length seal . It is 19" L X 1" H X 7/8" W
"IF" you are missing both L&R #4 seals there are NOS assemblies online that include both #2 & #4 seals as 1 complete assembly.
That assembly part number is GM #331871 parts catalog say fits 1972-1981
Here is a diagram with part numbers for the 77.
Note: It can get real confusing on what seals to order depending on your cars options, but the vertical side and top seals fit all options.



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Old Apr 4, 2023 | 05:58 PM
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Originally Posted by boat196
Are you sure that’s the correct seal, too me that looks like a seal for a big block hood.
Doc Rebuild shows two seals, I see the seal from your pic as #3966392 for 454 or LT1 yours seal looks like it comes to a point it rather than a flat center like #3972379.


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Old Apr 4, 2023 | 10:02 PM
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Mine (72 BB hood) had the 2 pins and sits here



Now I have added a foam hood liner so the original space to the hood was smaller now and the seal foam was quite stiff
I found it was pressing too hard on the hood, so I shaved the top of it (hot wire) a bit better than 1/8" along where it was pressing the hardest into the soft hood liner. There's a complete seal across but it doesn't press more than the indent on the foam hood liner any more
M
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