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Rusting hood?

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Old Sep 20, 2008 | 07:00 PM
  #1  
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Rusting hood?

The leading edge of my Expedition's hood is appearing to be rusting from the inside out. I thought the hoods were made of aluminum. There are about 5 different areas where the hood edge meets the grille that the paint is bubbling up from underneath.

Has anyone else had this happen to them? It's very odd!
 
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Old Sep 20, 2008 | 10:05 PM
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My 99 is doing the samething. It is going in this week to get repainted along with the door bottoms that are starting to show a little rust on the inside lip.
 
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Old Sep 21, 2008 | 08:01 AM
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Correct me if I am wrong, but is Ford's rust-through warranty 6yrs or 100k miles? If that is the case, I am hoping I may still be covered. I don't quite have 100k on mine yet and I've had it for exactly 6yrs. I can see the dealer arguing with me about this, though.
 
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Old Sep 21, 2008 | 09:21 AM
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Originally Posted by ExpySport
The leading edge of my Expedition's hood is appearing to be rusting from the inside out. I thought the hoods were made of aluminum. There are about 5 different areas where the hood edge meets the grille that the paint is bubbling up from underneath.

Has anyone else had this happen to them? It's very odd!
They are aluminum and there is a paint adhesion problem with aluminum. The 03 has paint bubbling up on the rear gate right below the license plate.
 
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Old Sep 21, 2008 | 09:22 AM
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Originally Posted by ExpySport
Correct me if I am wrong, but is Ford's rust-through warranty 6yrs or 100k miles? If that is the case, I am hoping I may still be covered. I don't quite have 100k on mine yet and I've had it for exactly 6yrs. I can see the dealer arguing with me about this, though.

Since it is the paint not adhering to the aluminum and not rust I doubt you would be covered under this.
 
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Old Sep 21, 2008 | 12:38 PM
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Aluminum doesn't rust. If there are signs of rust, then your hood probably has a steel underframe for strength with an aluminum skin on it to make it lightweight.
 
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Old Sep 21, 2008 | 01:13 PM
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Originally Posted by alloro
Aluminum doesn't rust. If there are signs of rust, then your hood probably has a steel underframe for strength with an aluminum skin on it to make it lightweight.

It appears to be rust, but if you know alittle about auto body then you realize that it is the paint bubbling from a lack of adhesion
 
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Old Sep 21, 2008 | 11:42 PM
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Originally Posted by alloro
Aluminum doesn't rust. If there are signs of rust, then your hood probably has a steel underframe for strength with an aluminum skin on it to make it lightweight.
I am aware aluminum doesn't rust. I mentioned the paint is bubbling up from underneath and thought it was odd that it would appear it was rusting, knowing aluminum doesn't rust. Sounds like a common issue with the aluminum and paint adhesion, similar to the Chrysler products in the early 90's whose paint flaked off.
 
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Old Sep 21, 2008 | 11:48 PM
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Originally Posted by 99Exp
It appears to be rust, but if you know alittle about auto body then you realize that it is the paint bubbling from a lack of adhesion
99Exp,

Thanks for your help on this. I have no auto body background and wouldn't have figured out the problem without your tech knowledge on the subject. I'm going to stop at my dealer this week, just for giggles, and see what they say. Worth a shot. Thanks again!
 
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Old Oct 4, 2008 | 10:06 AM
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Just a follow-up to this post. I finally had a chance to stop at the Ford dealer. The service writer said he didn't think it would be covered. I went to the service manager and he said he could try to get it covered 2 different ways, but certain criteria had to be met. It won't be covered under the paint warranty, because it only carries a 3yr/36K warranty, and I am well beyond that. He said I would be covered by the rust through/corrosion warranty, but in order to be considered, there had to be a hole the size of a quarter in the metal before Ford will even consider covering it, and I do not have any holes in the metal. He suggested some nice body shops in the area I could go to to get it repaired. So....

...I'm out of luck. Was worth a shot anyway.
 
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Old Oct 5, 2008 | 08:01 AM
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my 2002 has the same issue. On the front edge and on each corner at the rear. Bubbling has gotten progressivley worse for the past two years and now starting to flake off. No rust on surface of hood, just what looks like oxidized aluminum.
 
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Old Oct 5, 2008 | 10:17 PM
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You are right in saying that aluminum does not rust but it does corrode. It first apprears as a white powder, and possible pitting, worst case it will start to flake and perferate through the panel.
 
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Old Oct 7, 2008 | 07:44 AM
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Originally Posted by AF Mezkin
You are right in saying that aluminum does not rust but it does corrode. It first apprears as a white powder, and possible pitting, worst case it will start to flake and perferate through the panel.
Aluminum corrosion is very common, it's the equivalent of rust found in iron based alloys. There are two common types of aluminum corrosion, exfoliation (surface corrosion) and inter-granular (corrosion that starts inside the part due to casting or heat treating imperfections). There is also dissimilar metal corrosion when two different types of bare metal touch each other and an electrical path is formed, usually the aluminum losses in this battle. I get to deal with this all the time since I am a service adviser for the third largest aircraft manufacture in the world.
My advice, stop it in its tracks. Since most people don't have easy access to aviation type repair materials, go to a reputable boat repair facility. They can hook you up with the needed materials and tell you what to do. It is easy to treat if you catch it in time. If you live by a small local airport, swing in there and hook up with an aircraft mechanic, they will also help you.

These are my babies.... Bombardier | Aerospace | Business Aircraft | Bombardier Global
 

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Old Oct 8, 2008 | 09:12 AM
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The bubbling on the hood is due to corrosion. We just had the hood on the 2000 Expedition fixed due to the bubbling above the drivers headlight. I think it ran around 6-700 to have it taken care of.
 
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Old Oct 9, 2008 | 12:05 PM
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I have the same issue on my '02. Spoke to the local Ford dealer and he informed me that Ford no longer covers the repair. If the problem had occurred within the first two years of the vehicle, Ford was replacing the hood. After that they would only consider partially covering the cost. He said that after four years, you're on your own. He did add that anyone that had installed any type of bugshield to the hood was refused help regardless of the age of the vehicle. But, Ford has known of this issue from the get go that it is a paint adhesion problem due to contamination during the manufacturing/paint process.

I'm just going to live with mine for the time being. $600-700 out of pocket can't even be considered at this point.
 
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