FREAKING OUT, Corrosion

[JayJay]

If they are leaving the hinge raw steel and the door raw aluminum and slamming them together, Holly crap.

The hinge isn't steel. Try using a magnet on yours to verify.

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[longfiredragon]

The hinge isn't steel. Try using a magnet on yours to verify.

Thanks. Currently I don't have an issue except a smidge on a hood hinge I am keeping an eye on. I haven't tested it. I was just going by what I've seen on here. Maybe I got it wrong but I thought people were saying the hinges are steel, on an aluminum door. Thanks.

 

[sunset]

Maybe I got it wrong but I thought people were saying the hinges are steel, on an aluminum door.

People ARE saying that, including the article referenced earlier in this thread from which I quote:

Endless videos and forum posts claim that Jeep’s combination of steel hinges with aluminum doors is the root cause of the corrosion issue.

https://www.theautopian.com/owners-are-furious-about-the-jeep-jl-wranglers-corrosion-issues/

 

[casper_rubicon]

The TSBs for this are for the 2018-2023 JL and 2020-2023 JT and stop with the 2024s. There are several other threads regarding this topic and in a couple of them people with 2024s have taken their hinges off and the shims were there. The hinge parts were redesigned for the 2024 model year and the hinge part numbers include the zinc shim affixed to the hinge directly from the factory.

Also to answer purpurite afaik the shims are not available separately; they are affixed to the redesigned hinges directly.

Here is a thread where the new hinge parts are discussed

https://www.jlwranglerforums.com/fo...-add-zinc-plate-between-door-and-hinge.115944

Do you know if the door and hinge were painted completely so the metal isnt making contact with the shim? or was the shim painted?

 

[dsgrey]

I went out and checked my 2019 which hasn't shown any issues. I saw a video where a guy talked about using your fingers to feel for the bumps. My hinges and exterior appearance have no issues but just inside the bottom of the passenger back door, I have 3 bumpy areas where it's starting.

 

[AcesandEights]

... Any advice? Or am I going to have to fork out my own money for new doors, paint job, and labor?

...

If your warranty is expired, you should pay to repair it.

 

[Ratbert]

People ARE saying that, including the article referenced earlier in this thread from which I quote:

Endless videos and forum posts claim that Jeep’s combination of steel hinges with aluminum doors is the root cause of the corrosion issue.

https://www.theautopian.com/owners-are-furious-about-the-jeep-jl-wranglers-corrosion-issues/

Understood, but the hinges are NOT steel.

The bolts and pins might be (they're attracted to a magnet), but the hinges are not. Take a magnet and verify for yourself.

 

[Greenjeepthing]

I took a closer look at mine this morning. Just 1 hinge, right lower. I think I'll wait for the aftermarket to come out with a repair procedure. 2018 with 60k. Also out of warranty.

 

[Ratbert]

People ARE saying that, including the article referenced earlier in this thread from which I quote:

Endless videos and forum posts claim that Jeep’s combination of steel hinges with aluminum doors is the root cause of the corrosion issue.

https://www.theautopian.com/owners-are-furious-about-the-jeep-jl-wranglers-corrosion-issues/

You quoted a segment of the article, but did you actually read the very next sentence???

However, a reality check suggests that’s not entirely accurate.

 

[sunset]

You quoted a segment of the article, but did you actually read the very next sentence???

A question directed at my ability to comprehend. Hmm... getting a Deja vu feeling here.

Yes, yes, yes, I actually read that next sentence and the entire article before I posted anything.

Please, I do not wish to get into another perception conflict with you, so let me clarify at length:

I merely wanted to advise @longfiredragon that he was not mistaken in believing others had stated it was steel hinges against aluminum doors. BTW, the quote I had posted contained the word "claim", a word that signifies allegation.

My post in no way said or had meant to imply from me that what I quoted was the absolute truth or that I believed it was the absolute truth. Only that he was not crazy for having believed he heard it elsewhere, including reading it in "endless videos and forum posts".

I hope I've clarified my apparently oblique intentions.

Just for you, I did just now take a dime-sized magnet out to my Jeep. It did not stick to the hinge but did stick to the two bolt heads holding the hinge plate to the door and did stick to the exposed head of the pin in the hinge itself.

Thank you.

edited to change "metal" to "steel" and "bolt" to "pin".

 

[Halxen]

You quoted a segment of the article, but did you actually read the very next sentence???

I have no issue admitting that I was also under the impression from what I have previously read that the hinges were still steel; which the article you've linked did a great job explaining why that was the case. This would definitely reinforce the issue bing a prep/paint problem.

The only thing I'm really disappointed with that article was that they missed the obvious opportunity for the title...

Owners Are Furious Ferrious About The Jeep JL Wrangler’s Corrosion Issues

 

[Ratbert]

A question directed at my ability to comprehend. Hmm... getting a Deja vu feeling here.

Yes, yes, yes, I actually read that next sentence and the entire article before I posted anything.

Please, I do not wish to get into another perception conflict with you, so let me clarify at length:

I merely wanted to advise @longfiredragon that he was not mistaken in believing others had stated it was metal hinges against aluminum doors. BTW, the quote I had posted contained the word "claim", a word that signifies allegation.

My post in no way said or had meant to imply from me that what I quoted was the absolute truth or that I believed it was the absolute truth. Only that he was not crazy for having believed he heard it elsewhere, including reading it in "endless videos and forum posts".

I hope I've clarified my apparently oblique intentions.

Just for you, I did just now take a dime-sized magnet out to my Jeep. It did not stick to the hinge but did stick to the two bolt heads holding the hinge plate to the door and did stick to the exposed head of the bolt in the hinge itself.

Thank you.

I too initially thought that the hinges were steel. That would seem to be the obvious explanation for these issues. But, of course, they're not steel, in which case I'm a bit confused as to why Jeep apparently started putting in shims.

The hinges are definitely of a dissimilar metal than their bolts and pins. I wonder how prevalent the issue is where those meet. And,of course, those bolts are bolted to the door.

It gets more complex, however, when we realize that the issue also occurs in areas that aren't near any dissimilar metals. That observation tends to imply that something else is at play, either additionally or exclusively. Questionable prep work seems to be the most likely candidate explanation for those instances and a dissimilar metal got introduced. Or water simply made its way in.

I'm betting there's no single root cause, but instead a few different issues. Most of us experience none of them. Some people, however, aren't so lucky.

 

[sunset]

I too initially thought that the hinges were steel. That would seem to be the obvious explanation for these issues. But, of course, they're not steel, in which case I'm a bit confused as to why Jeep apparently started putting in shims.

The hinges are definitely of a dissimilar metal than their bolts and pins. I wonder how prevalent the issue is where those meet. And,of course, those bolts are bolted to the door.

It gets more complex, however, when we realize that the issue also occurs in areas that aren't near any dissimilar metals. That observation tends to imply that something else is at play, either additionally or exclusively. Questionable prep work seems to be the most likely candidate explanation for those instances and a dissimilar metal got introduced. Or water simply made its way in.

I'm betting there's no single root cause, but instead a few different issues. Most of us experience none of them. Some people, however, aren't so lucky.

I'm with you 100% here.

 

[alphawolff]

I too initially thought that the hinges were steel. That would seem to be the obvious explanation for these issues. But, of course, they're not steel, in which case I'm a bit confused as to why Jeep apparently started putting in shims.

The hinges are definitely of a dissimilar metal than their bolts and pins. I wonder how prevalent the issue is where those meet. And,of course, those bolts are bolted to the door.

It gets more complex, however, when we realize that the issue also occurs in areas that aren't near any dissimilar metals. That observation tends to imply that something else is at play, either additionally or exclusively. Questionable prep work seems to be the most likely candidate explanation for those instances and a dissimilar metal got introduced. Or water simply made its way in.

I'm betting there's no single root cause, but instead a few different issues. Most of us experience none of them. Some people, however, aren't so lucky.

The bolts used to mount them are steal, not aluminum like the doors themselves. So right there is two dissimilar metals in contact. Just going off boat math here, but using a anode (the shims) to eat the corrosion makes sense.

As you said, it's a prep issue which is the primary cause of the corrosion. Since the hinges are painted over it's very possible small bits from the threading, either on the bolt itself of the thread from the doors, is the original cause of the corrosion. Hell, it could be the drill that drilled the threads into the door living bits behind. It's possible the shims can counteract the corrosion process once it has begun, and allow them to eat most of the corrosion rather than the metal under the paint. The corrosion we see after all is just gas pockets forming under the paint from the chemical process. I'm not a material scientist so just spit balling here, but it makes sense to me

 

[Ratbert]

The bolts used to mount them are steal, not aluminum like the doors themselves. So right there is two dissimilar metals in contact. Just going off boat math here, but using a anode (the shims) to eat the corrosion makes sense.

As you said, it's a prep issue which is the primary cause of the corrosion. Since the hinges are painted over it's very possible small bits from the threading, either on the bolt itself of the thread from the doors, is the original cause of the corrosion. Hell, it could be the drill that drilled the threads into the door living bits behind. It's possible the shims can counteract the corrosion process once it has begun, and allow them to eat most of the corrosion rather than the metal under the paint. The corrosion we see after all is just gas pockets forming under the paint from the chemical process. I'm not a material scientist so just spit balling here, but it makes sense to me

That makes perfect sense for the issues adjacent to the hinges.

There are also issues in areas nowhere near hinges. Yeah, we can try to further speculate on what could cause those, but even their engineers seem to be incapable of solving them all.

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