[Z06] Hood Seal
Melting Slicks
Joined: Mar 2001
Posts: 2,370
Likes: 51
From: New Milford CT
The bad is that GM engineers left it off the car for a reason. It lets more air in an out of the engine bay, keeping temperatures colder and thus colder air is going to an underhood air cleaner.
GM did not just "forget" to put a seal on there. Your choice, cleaner engine, or better performance. Just my common sense view.
GM did not just "forget" to put a seal on there. Your choice, cleaner engine, or better performance. Just my common sense view.
Drifting
Joined: Feb 2002
Posts: 1,732
Likes: 1
From: www.Z16.org Western NY
Originally Posted by CJS
The bad is that GM engineers left it off the car for a reason. It lets more air in an out of the engine bay, keeping temperatures colder and thus colder air is going to an underhood air cleaner.
GM did not just "forget" to put a seal on there. Your choice, cleaner engine, or better performance. Just my common sense view.
GM did not just "forget" to put a seal on there. Your choice, cleaner engine, or better performance. Just my common sense view.
They included it on the C6.
Le Mans Master
Joined: Nov 2001
Posts: 6,984
Likes: 0
From: Central Coast CA
Originally Posted by CJS
GM did not just "forget" to put a seal on there. Your choice, cleaner engine, or better performance.
So the air entering the nose inlets and from underneath the car isn't enough? I find that hard to believe.
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Brett Foote
Safety Car
Joined: Mar 2001
Posts: 3,567
Likes: 0
From: Aurora IL
With the Motor City Mold hood, I am not worried about the loss of flow from an unsealed gap. On the filp side, my engine bay stays much cleaner with out the debris forced in through that vent crack you say GM enginered there.
Melting Slicks
Joined: Mar 2001
Posts: 2,370
Likes: 51
From: New Milford CT
Look, I doubt that putting the hood seal on a C5 causes any serious air flow recuction problems, because so many people do it without apparant harm.
But What I am saying is that GM Wind Tunnel tested and engineered the air flow of the C5 for inside the engine compartment, and outside the car, flow characteristics.
I believe that the open front hood gap allows air to flow up and out of the engine compartment. So air flow from the front underside of the car can then have an Escape route, Up and over and around the Air Cleaner and then up and out of the hood gap. In fact at speed, air should be positively sucked out of the gap.
Without an escape outlet air does not and cannot flow. The front of a C5 engine compartment above the shroud is pretty much sealed off, so flow in that area may be limited. Maybe the gap ,with out the seal, increases flow and reduces temperatures at the air cleaner by say 10%. If this is true, It would be a real effect, but the average person would not notice, only the hard core drag racer looking for tenths off the time slip.
But What I am saying is that GM Wind Tunnel tested and engineered the air flow of the C5 for inside the engine compartment, and outside the car, flow characteristics.
I believe that the open front hood gap allows air to flow up and out of the engine compartment. So air flow from the front underside of the car can then have an Escape route, Up and over and around the Air Cleaner and then up and out of the hood gap. In fact at speed, air should be positively sucked out of the gap.
Without an escape outlet air does not and cannot flow. The front of a C5 engine compartment above the shroud is pretty much sealed off, so flow in that area may be limited. Maybe the gap ,with out the seal, increases flow and reduces temperatures at the air cleaner by say 10%. If this is true, It would be a real effect, but the average person would not notice, only the hard core drag racer looking for tenths off the time slip.
Burning Brakes
Joined: Jul 2004
Posts: 1,202
Likes: 5
Hood Seal
I treid the hood seal twice. It would never stick in the area where the front of the engine compartment formed a slight "V". A body shop tried using their adhesive...it still did not work. Other than looking nice when I first put it on, it did not work once I closed the hood...everytime I closed the hood, it made the hood seal that much worse. It seems that the seal never wanted to make that bend in the middle of the engine compartment (where there is a slight "V" shape).
Pro
Joined: May 2003
Posts: 522
Likes: 1
From: Reston VA
Originally Posted by Cruncher
I treid the hood seal twice. It would never stick in the area where the front of the engine compartment formed a slight "V". A body shop tried using their adhesive...it still did not work. Other than looking nice when I first put it on, it did not work once I closed the hood...everytime I closed the hood, it made the hood seal that much worse. It seems that the seal never wanted to make that bend in the middle of the engine compartment (where there is a slight "V" shape).
Recently, I ordered the GM seal strip ($17 and is the same one that is on the sides of the hood) and it works and looks great. It is not a big bulbous piece of plastic like the ones sold in catalogs, and therefore is easy to install and mold.
When I installed it, I made sure to stick it as close to the top edge of the bumper cover, without actually touching the edge. Since this seal is much smaller than the aftermarket ones, you have to adhere it to the vertical surface of the bumper cover rather than the horizontal, to make sure that you have a good seal.
Chris
Le Mans Master
Joined: Dec 2000
Posts: 7,096
Likes: 153
From: "Atlanta" Ga.
I used 3M 2 sided heavy duty tape (holds up to 5 lbs). Just fold it into the corner formed by the nose and the inside lip, and place the seal where it goe's. No problems since.
Also prep the area with denatured alcohol to allow a good STICK.
Mine fell off several times before I did this
Also prep the area with denatured alcohol to allow a good STICK.
Mine fell off several times before I did this
Pro
Joined: May 2003
Posts: 522
Likes: 1
From: Reston VA
Originally Posted by Dave1998
Can I get the GM part #? I want 1. Let me know what to ask for
thanks
thanks
I don't have a part number, but if you call Lambert Pontiac/Buick/GMC in Ohio (this is an old and well known F-body forum parts contact) @ 888-720-7718 and ask for Steve, he will hook you up.
Just tell him that you want 1 piece of the seal that runs along side of the fender inside the engine bay. They are a great place to deal with and have excellent prices (I think they sell to the clubs/forums at 10% over cost or something like that; I know that their prices are as good or better than GM Direct).
Let me know if you have any problems or questions.
Chris
Team Owner
Joined: Jul 2003
Posts: 34,299
Likes: 1
From: [Enter Unoffensive Comment Here]
Cruise-In VI Veteran
Cruise-In VII Veteran
St. Jude Donor '06
I find it odd that after this many posts no one has commented on the tremedous hp gains. 
Last edited by lager99; Jul 23, 2004 at 11:24 AM. Reason: spelling
