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08-05-2023, 09:36 AM
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#1 |
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Registered User
Join Date: Mar 2006
Location: Latrobe, Pa. 15650
Posts: 342
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Hood seal
What is the proper installation of the hood seal? I see them installed different ways at the car shows. Some have the rubber pointing up, some pointing down. Some don't have any at all. I ask questions. The ones who have them pointing down say it prevents the hood to close all the way down in the back. So which way is the factory install?
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08-05-2023, 09:42 AM
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#2 |
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Registered User
Join Date: Jan 2010
Location: Here
Posts: 5,420
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Re: Hood seal
Pointng up. Pointing down doesn't seal anything and is pointless. Thea seal is there so heat from the engine and any other smells from the engine bay don't come I to the cowl which from here could come into the cab.
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08-05-2023, 09:58 AM
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#3 |
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The Older Generation
   
Join Date: Aug 2006
Location: Montezuma, Iowa
Posts: 25,332
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Re: Hood seal
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The people that have a problem with the hood not closing correctly after they install the seal is not because of the direction it is installed, it is because the seal is made wrong. The lip on the seal should not stick straight up it should lay back slightly so the hood pushes it down when you close it. The early reproduction seals were all made wrong and held the back of the hood up when closed. Someone came out with a seal that had the correct profile and they worked good. I don't know if the bad ones are still being made but you should be able to find one with the correct profile. I will see if I can find pictures of the difference. EDIT: First picture s the bad one. Second picture is the good one..... Try GMCPauls truck parts. LockDoc
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Leon Locksmith, Specializing In Antique Trucks, Automobiles, & Motorcycles (My Dually Pickup Project Thread) http://67-72chevytrucks.com/vboard/s...d.php?t=829820 - Last edited by LockDoc; 08-05-2023 at 10:13 AM. |
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08-05-2023, 06:25 PM
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#4 | |
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Registered User
Join Date: Jul 2021
Location: Keller, Texas
Posts: 442
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Re: Hood seal
Quote:
LockDoc is 100% correct. I first replaced my hood seal with one that stood straight up, and my hood did not fully close down. It would when the old one was in it. People told me it was due to worn out hood hinges. Then I read on this site about the original ones layed over. I got the right one from GMCPauls and now everything is back to normal. Pic is from my 72 C20 Cheynne Super. |
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08-05-2023, 07:41 PM
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#5 | |
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Senior Member
Join Date: Jan 2012
Location: Texan, back in TX
Posts: 2,100
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Re: Hood seal
Quote:
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08-05-2023, 08:02 PM
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#6 |
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Registered User
Join Date: Nov 2022
Location: Seattle, WA
Posts: 312
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Re: Hood seal
Mine looks just like D.B's on my original low mile '72 Cheyenne. The purpose of the slight slant is when the hood closes, it pushes that gasket down against the cowl....though I really don't think it severs much of a purpose. LOL
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'72 C10 Cheyenne SWB North Carolina truck for 50 years, 72k original miles, Medium/Hawaiian Blue, 3 owners - one for 40 years, garaged kept, original: sheetmetal, undercarriage, moldings, glass * * * New - engine rebuild at 65k in 2015, one repaint in 2010, new front bumper, houndstooth seat, carpet, 8 inch rally wheels on 275-60R-15, LED lighting. - Semper Paratus! |
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08-05-2023, 08:22 PM
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#7 | |
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Registered User
Join Date: Jul 2021
Location: Keller, Texas
Posts: 442
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Re: Hood seal
Quote:
I wonder if the hood seal was used to keep water from running in between the hood and cowl, then dripping onto the distributor and coil. |
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08-08-2023, 10:18 AM
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#8 | |
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Senior Member
Join Date: Mar 2005
Location: Jurupa Valley, Ca
Posts: 1,209
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Re: Hood seal
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Terry 1970 Custom Camper/C20 , GM Crate 350/7004R, Dana 60, factory AC |
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08-08-2023, 11:16 AM
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#9 |
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All stock and staying that way
Join Date: Jul 2003
Location: Elkland, PA
Posts: 1,306
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Re: Hood seal
If NOS is not available, I'd be looking at Fairchild rubber seals. In my experience, they seem to be the closest to OEM fit and rubber quality.
Their cowl seal is part number G4064 which replaces GM part numbers 3761922, 3886791, or 6270848.
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1970 K/5 Blazer CST 4WD, Bronze, 93k ACT. miles, 350, 4 speed, positraction, 16.5" x 8.25" wheel option, tilt, tach, vacuum, AM/FM, manual throttle...Dad ordered and purchased new 4/70. Currently frame off restoration in progress...  1972 Cheyenne Super 20 2WD, DK Blue/White, 90K ACT. miles, 402, TH400, 4.10 open, tilt, tach, vacuum, A/C, AM/FM, manual throttle.. A mostly original paint never rusted Texas survivor...  2017 Sierra 1500 SLT 4WD, Black, 41k miles, 5.3, 6L80E, 3.42 LS, 20" polished wheels, everything but moonroof and 6.2... 2019 Canyon SLT 4WD, White, 60k miles, 3.6, 8L45, 3.23 LS, 18" wheels Last edited by 1970cstblazer; 08-08-2023 at 11:21 AM. |
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