174 replies to this topic

[strong_j]

hey guys i washed my car today and noticed that around the hood pins the paint was bubbling, and i heard it was from the steel screw goin in the aluminum hood.. so it goin in next week to get it fixed and to see if its covered by warranty. i was wondering what they have to do to get it fixed ? do they sand the whole hood and repaint it or is it a quick fix? and also wondering since its in there should i just make them put the billet hood pins on there since its already in the shop?

[mbadgley]

I had the same problem. They had to strip, repaint and restripe the entire hood. It was taken care of by Ford and Shelby under warranty.

[SGT3369]

strong_j, on Sep 27 2008, 02:07 PM, said:

hey guys i washed my car today and noticed that around the hood pins the paint was bubbling, and i heard it was from the steel screw goin in the aluminum hood.. so it goin in next week to get it fixed and to see if its covered by warranty. i was wondering what they have to do to get it fixed ? do they sand the whole hood and repaint it or is it a quick fix? and also wondering since its in there should i just make them put the billet hood pins on there since its already in the shop?

Was it only around the outside of the plate or under also? That's scary.

[StratGirl]

mbadgley, on Sep 27 2008, 11:12 PM, said:

I had the same problem. They had to strip, repaint and restripe the entire hood. It was taken care of by Ford and Shelby under warranty.

Did they give you new aluminum screws to replace the old ones, or did you have to hunt them down yourself?

[SGT/SC#0471]

Hi I am into boats and salt water and I have also fabricated large scale outdoor sculpture for municipalities out of various metals. I can tell you that dissimilar metals in contact with one another will corrode over time. The less noble metal will corrode away. There are entire books written on this topic.

I am not an expert, but in my experience the only way to keep this from reoccuring is to use the billet (aluminum) pins and plates and aluminum screws.

I believe that the steel screws going into the aluminum hood is causing the corrosion.

I may be wrong but this is what I know and why I think that. Google galvanic corrosion for more info.

edit for clarity.

Edited by mccoystudio, 28 September 2008 - 06:21 AM.

[mbadgley]

We actually replaced the escutcheon with the Shelby model that they used on the '08 models. I will look and see what the scews were made of.

[SGT/SC#0471]

I have not checked under my plates...but I do park within 20 feet of salt water on a regular basis. I live near alot of salt air and water and I park at a marina often. Mine has not bubbled out yet, but it is a concern for me. I like the 07 set-up aesthetically but may switch if I have to.

I use a product called Corrosion X on the metals on my boat down below, through hulls, bolts, shafts and rudder arms. Lots of big bronze parts. And I use it on the chassis of my older vehicles to prevent rust, it works. Obviously it is not for a hood, but I may put it on my rear end on the SGT unless I decide to paint the rear end at some point.

On boats you have bronze props and stainless prop shafts immersed in salt water, making effectivly a battery which you can measure the voltage, but you also have zincs (chunks of zinc bolted to boat and grounded to dc eletrical system) which erode away, as zinc is the less noble metal. The zincs are sacrificial anodes.

No salt water immersion and all aluminium on the hood and hardware and the problem should go away, IMO

As a side note there are obviously many grades of various alloys, I have found that I try not to use imported metal in my work. There is a difference when you work with it.

Rust/corrosion it never ends.

Keep us posted.

[strong_j]

i only see it around the plate, but i havent lifted the plate to see under it... it goes in tomarrow and ill tell yall what they say..
and mbadgley thx for the help..

[TRGriff]

strong_j, on Sep 27 2008, 02:07 PM, said:

hey guys i washed my car today and noticed that around the hood pins the paint was bubbling, and i heard it was from the steel screw goin in the aluminum hood.. so it goin in next week to get it fixed and to see if its covered by warranty. i was wondering what they have to do to get it fixed ? do they sand the whole hood and repaint it or is it a quick fix? and also wondering since its in there should i just make them put the billet hood pins on there since its already in the shop?

I have a question. Have you had a chance to pull off a hood pin plate? I pulled off one of my hood pin plates and found some type of gasket, possibly plastic, separating the steel from the hood. I wonder if all of the cars (07) had this gasket. The screws definitely are stainless. Thanks, Tom

[bruces]

I too have gaskets between plate and hood, I replaced the cheap SAI plate with concours quality plate from Tony Branda, alos when I had off waxed the entire hood pin area to include under the hood, waxed the screws palre pins everything, BUT my car is not a daily driver and never sees rain and is stoed under top grade cover.

[JeffIsHereToo]

TRGriff, on Sep 28 2008, 10:22 PM, said:

I have a question. Have you had a chance to pull off a hood pin plate? I pulled off one of my hood pin plates and found some type of gasket, possibly plastic, separating the steel from the hood. I wonder if all of the cars (07) had this gasket. The screws definitely are stainless. Thanks, Tom

Yes, it's rubber, and they all have it...or should.

[SGT/SC#0471]

bruces, on Sep 29 2008, 05:55 AM, said:

I too have gaskets between plate and hood, I replaced the cheap SAI plate with concours quality plate from Tony Branda, alos when I had off waxed the entire hood pin area to include under the hood, waxed the screws palre pins everything, BUT my car is not a daily driver and never sees rain and is stoed under top grade cover.

If and if, it is caused by galvanic corrosion, which is what I am thinking,  the wax will not help. It is caused by the two dissimilar metals in contact with one another.

[ShelbyDW]

Just had mine done as well. Repaint, Restrip, etc... 3 weeks later got it out of the shop. Still has some minor issues on the new scoop rivets not being set all the way down. Currently working with the dealer to resolve the issue.

[StratGirl]

So there's no fix yet being offered by SAI on the hood pin bubbling issue? They're not re-issuing new hood pins made of aluminum or with aluminum screws? I have the same paint bubbling issue, but I don't want to go through the trouble of having it sanded and re-painted, only to have the same issue in 6 months when they put the same kind of hood pins back in. Any ideas?

[JeffIsHereToo]

Could the plates be attached using Emblem tape or adhesive?  It's not like they could fall off if they ever came loose etc.

[SGT/SC#0471]

I do not know for a fact that is whats happening, but my experience dictates its the two different metals.

Stainless Screws, Aluminum hood, corroding aluminum due to dissimilar metals...bubbled paint.

This is just my thought.

My car does not have the issue.

If I did I would install the aluminum plates and pins with aluminum screws reguardless of what they offered to replace them with.

[herpony68]

The hood pins, screws, plate and all flew off my car at speed on the highway one day.  They were replaced under the warranty, but if it happens again, i am going to the GT-H pins or another type, especially if others are having trouble too!

[greaser]

herpony68, on Sep 29 2008, 08:22 PM, said:

The hood pins, screws, plate and all flew off my car at speed on the highway one day.  They were replaced under the warranty, but if it happens again, i am going to the GT-H pins or another type, especially if others are having trouble too!

  what? how the he!! could that happen did the pin fail? but even if that happend i cant see the whole set up just seperating from the hood.

[Pastor Passum]

herpony68, on Sep 29 2008, 09:22 PM, said:

The hood pins, screws, plate and all flew off my car at speed on the highway one day.  They were replaced under the warranty, but if it happens again, i am going to the GT-H pins or another type, especially if others are having trouble too!

Both of them

Jim

[JeffIsHereToo]

greaser, on Sep 29 2008, 09:21 PM, said:

  what? how the he!! could that happen did the pin fail? but even if that happend i cant see the whole set up just seperating from the hood.

+1  This would have to be THREE failures.  First all four screws would have to come loose or be ripped out, second the pin and bolt would need to fail and even if it did can it pull up and out of the hood, and three the lanyard would have to detach otherwise the pin would be flapping around the front grill.  I'm just trying to visualize all the parts and how they interact and understand how you could have the entire setup fly off?  I'd be interested in hearing more because that's never been brought up, that I am aware of, as an issue.

Edited by JeffIsHereToo, 29 September 2008 - 11:39 PM.