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Aluminum fender corroded thru by its attaching Steel Bolt.

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Old 08-10-2015, 06:07 PM
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Originally Posted by bigandtall
I put a magnet on these and they are steel and appear to have no coating when I looked at the underside of the bolts. It may be awhile before I get back to the dealer. It's 80 miles round trip for me and I was just there today getting my first oil change and my exterior paint defects lined up for repainting by Ford. Wish I had seen this before I got back home today.
Make sure you get them to check it next time you are there. You don't have any Ford dealers closer than 80 miles??

After looking closer at that bolt, it looks like a bolt with built in washer (steel) and a different washer under it. The washer under it should be non-metallic or coated Aluminum probably.


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Last edited by CurryBob; 08-10-2015 at 06:10 PM.
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Old 08-10-2015, 06:12 PM
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Originally Posted by snobdds
The steel would be the first metal to corrode, not the aluminum.

Ready, Fire, Aim...
This is not true. When the aluminum is the base metal and the fastener is steel or cast iron, the corrosion of the base metal is increased by the fastener.
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Old 08-10-2015, 06:19 PM
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Even if you could argue that it wasn't corrosion, just look at all the air bubbles around the washer. Doesn't seem to be very much holding that assembly together.
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Old 08-10-2015, 06:21 PM
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Originally Posted by bigandtall
This is not true. When the aluminum is the base metal and the fastener is steel or cast iron, the corrosion of the base metal is increased by the fastener.
Yeah...

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Old 08-10-2015, 06:25 PM
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Originally Posted by CurryBob
Make sure you get them to check it next time you are there. You don't have any Ford dealers closer than 80 miles??

After looking closer at that bolt, it looks like a bolt with built in washer (steel) and a different washer under it. The washer under it should be non-metallic or coated Aluminum probably.


Bob
40 miles each way. Yes, there are dealers closer, but this is where I purchased the truck 2 weeks ago and they are the ones that are fixing the exterior paint (since they actually caused one of the problems so they need to fix).

The washer under it is also steel. Tested it with a magnet.
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Old 08-10-2015, 06:34 PM
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Originally Posted by bigandtall
40 miles each way. Yes, there are dealers closer, but this is where I purchased the truck 2 weeks ago and they are the ones that are fixing the exterior paint (since they actually caused one of the problems so they need to fix).

The washer under it is also steel. Tested it with a magnet.
Ugg, that can't be good!


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Old 08-10-2015, 06:49 PM
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Originally Posted by bigandtall


Here we go. Front passenger fender has corroded through due to its very own attaching steel bolt and washer.


I guess Ford did not study up on what happened to the old aluminum bodied Land Cruisers that used steel bolts throughout.


History repeats itself.
They were to busy testing the seat back cooling to worry about this.
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Old 08-10-2015, 06:57 PM
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Ford knew very well they have to use special coated fasteners in locations like this. Because if you don't his is exactly what inevitably happens. So I'm going to assume someone on the assembly line used the wrong bolts.
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Old 08-10-2015, 07:10 PM
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Originally Posted by Derodeo
Ford knew very well they have to use special coated fasteners in locations like this. Because if you don't his is exactly what inevitably happens. So I'm going to assume someone on the assembly line used the wrong bolts.
That is what it looks like.

I guess they didn't inform them what would happen if they did. They probably have no idea about unlike metals issues with galvanic corrosion.



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Old 08-10-2015, 07:52 PM
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Originally Posted by Derodeo
Ford knew very well they have to use special coated fasteners in locations like this. Because if you don't his is exactly what inevitably happens. So I'm going to assume someone on the assembly line used the wrong bolts.
I'm worried this is a systemic problem with all 2015 F150s. All the exposed ones I can find on my truck are this kind. Those are the tip of the iceberg. How many body panels are connected this way that I can't see?

I have no faith that Ford didn't just go with cheaper steel uncoated bolts after a quick life cycle cost analysis assumed corrosion would be much slower to onset.
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