Hinge corrosion

[Bobo57]

Just a quick point of reference, mini2nut speculated that Jeep might be adding some sort of spacer or zinc spacer between the hinge and door. Always being curious I went to the local dealer and checked out the Wranglers on the lot. Super interesting observations. About half of the lot inventory had definite paint issues that showed no paint between the hinge and door. The other half appeared to have paint under the hinge. Now maybe the robot had a good day for the second half but it sure seemed as if the paint did not stop or show a gap. It appeared also that there might be some spacer under the hinge but was super difficult to verify. Was checking out as many as I could and I found one that seemed to exhibit some type of spacer/barrier. It appears to be super thin.

Thoughts? Maybe the reps from Jeep can chime in on this?
THX
B

 

[ameldorf]

What I’ve seen on my 21 is that the OEM doors and hood are painted with the hinges installed and there is nothing between the door/hood and hinge.

For the half doors, that are painted by a third party, the hinge and door are painted separately and there’s a paint layer between hinge and door.

 

[Viking Jeeper]

What I’ve seen on my 21 is that the OEM doors and hood are painted with the hinges installed and there is nothing between the door/hood and hinge.

For the half doors, that are painted by a third party, the hinge and door are painted separately and there’s a paint layer between hinge and door.

Same thing back to the TJ or even earlier. No paint behind the door or tailgate hinge. Of course back then it was all steel.

 

[scarab]

Just a quick point of reference, mini2nut speculated that Jeep might be adding some sort of spacer or zinc spacer between the hinge and door. Always being curious I went to the local dealer and checked out the Wranglers on the lot. Super interesting observations. About half of the lot inventory had definite paint issues that showed no paint between the hinge and door. The other half appeared to have paint under the hinge. Now maybe the robot had a good day for the second half but it sure seemed as if the paint did not stop or show a gap. It appeared also that there might be some spacer under the hinge but was super difficult to verify. Was checking out as many as I could and I found one that seemed to exhibit some type of spacer/barrier. It appears to be super thin.

Thoughts? Maybe the reps from Jeep can chime in on this?
THX
B

I'm not seeing any difference, that looks like primer to me. I bet the doors are being primed before the assembly and are getting painted once the body is already put together.

 

[ameldorf]

I'm not seeing any difference, that looks like primer to me. I bet the doors are being primed before the assembly and are getting painted once the body is already put together.

Nope, it’s bare metal underneath

 

[Bobo57]

Nope, it’s bare metal underneath
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So frustrating, seems like such a logical change.

 

[scarab]

Nope, it’s bare metal underneath
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This is freakin nuts

 

[Mallcrawler_392]

 

[nismo1013]

Nope, it’s bare metal underneath
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Tangent, but what cart is that?

 

[chrisazm]

Ok so I have. 2022 392 and I had to take apart one of the door hinges to see what is going on. The hinge is aluminum. The bolt is galvanized on the threads only. There is a floating plate of steel behind the aluminum panel that makes up the door. That plate is unpainted and is pulled against the inside of the door panel when bolted on. Also the hinge pins are steel. To take the hinge off the door, the T-50 bit doesn’t quite fit in the bolt without damaging the paint. There is a square hole in the aluminum door panel that is larger than the bolts so the bolts only contact the steel plate behind the door. So the biggest problem is the steel plate behind the door panel contacting the inside of the door panel. The point is there are a lot of dissimilar metals in that area that is completely unnecessary. How much lighter are the aluminum doors compared to steel? I live in the desert so I’m hoping that will help but I don’t a see a way to resolve the issue because of the bare steel plate that hinge bolts secure to.
I’m basing my claims on magnet testing the metals.

 

[Ted392]

Ok so I have. 2022 393 and I had to take apart one of the door hinges to see what is going on. The hinge is aluminum. The bolt is galvanized on the threads only. There is a floating plate of steel behind the aluminum panel that makes up the door. That plate is unpainted and is pulled against the inside of the door panel when bolted on. Also the hinge pins are steel. To take the hinge off the door, the T-50 bit doesn’t quite fit in the bolt without damaging the paint. There is a square hole in the aluminum door panel that is larger than the bolts so the bolts only contact the steel plate behind the door. So the biggest problem is the steel plate behind the door panel contacting the inside of the door panel. The point is there are a lot of dissimilar metals in that area that is completely unnecessary. How much lighter are the aluminum doors compared to steel? I live in the desert so I’m hoping that will help but I don’t a see a way to resolve the issue because of the bare steel plate that hinge bolts secure to.
I’m basing my claims on magnet testing the metals.

That bites. I guess the plate behind panel is not removable?

Side note: AM General (Hummer H1, HUMVEES) have dissimilar metal corrosive issues. Aluminum tubs, steel bolt-on items. Salt accelerates the corrosion.

 

[ParadigmDawg]

I don't think you are supposed to put doors on a Jeep.

 

[chrisazm]

That bites. I guess the plate behind panel is not removable?

Side note: AM General (Hummer H1, HUMVEES) have dissimilar metal corrosive issues. Aluminum tubs, steel bolt-on items. Salt accelerates the corrosion.

The plates seem to be held in place but are also loose. If you were to take apart the entire door from the inside you might be able to get to it but that is a big undertaking. I didn’t try to remove the plate from the outside because I didn’t want To accidentally drop it inside the door.

 

[Ted392]

I don't think you are supposed to put doors on a Jeep. View attachment 33080

Nice! Same color, doorless is best.

But that reminds me of something you'd see in a Detroit parking lot after 15 minutes of being unattended and it's equipped with Igla.

 

[Viking Jeeper]

The plates seem to be held in place but are also loose. If you were to take apart the entire door from the inside you might be able to get to it but that is a big undertaking. I didn’t try to remove the plate from the outside because I didn’t want To accidentally drop it inside the door.

The TJ's have a plate inside door also. You would need to cut lots of metal to get it out. It's not fastened directly but the inside and outer panel were welded together with the plate inside. I suspect these are the same.