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Roof support ribs caved in #733781
March 06th 2018 7:54 pm
March 06th 2018 7:54 pm
Joined: Jan 2018
Posts: 25
CA
M
Miyagi Offline OP
newbie
Miyagi  Offline OP
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CA
Is there an easy fix for these bowed in ribs? I'm no welder, so about the only fix would be to drop bolts through the roof...and mar my lovely roof patina!

[Linked Image]

Attached Files IMG_20180304_113112368_noexif-612x816.jpg
Re: Roof support ribs caved in [Re: Miyagi] #733801
March 07th 2018 8:15 am
March 07th 2018 8:15 am
Joined: Apr 2004
Posts: 1,721
Ireland
shaggy Offline
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shaggy  Offline
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Posts: 1,721
Ireland
Put body panel adhesive on them and then use a few 2x4s and a few bottle jacks to push them back up to the roof and allow the adhesive to set? Just don't over do it with the jack.

Last edited by shaggy; March 07th 2018 8:15 am.

79 chevy G30 cobra camper conversion.
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Re: Roof support ribs caved in [Re: Miyagi] #733802
March 07th 2018 9:11 am
March 07th 2018 9:11 am
Joined: Sep 2005
Posts: 8,543
Georgia, USA
CatFish Offline
carpal tunnel
CatFish  Offline
carpal tunnel
Joined: Sep 2005
Posts: 8,543
Georgia, USA
Cut some replacements from a donor van in the junkyard. When cutting them out be sure to cut and leave some extra metal on the ends of the replacements. Cut your bent ones out flush on the ends and support the replacements like Shaggy said, securing them thru the extra metal on the ends into the existing metal. There should be enough gap along the ledge there on each side for some short, stout screws without penetrating the outside body.
My 2%

Last edited by CatFish; March 07th 2018 9:15 am. Reason: kant spel


If you owe the bank $100 that's your problem. If you owe the bank $100 million that's the bank's problem.
Re: Roof support ribs caved in [Re: Miyagi] #733807
March 07th 2018 3:10 pm
March 07th 2018 3:10 pm
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Miyagi Offline OP
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Miyagi  Offline OP
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I think you got an idea there, Catfish.
Shaggy, the issue with your idea is that a PO tried to gorilla glue the ribs back up or something, there's a foamy adhesive underneath which would need removal.
Not that I hadn't planned to do this anyway, but removing the ribs makes the job easier.
I could probably cut some tabs, get the edges to interlock somewhat, and combine both ideas here with screws and adhesive...
Anybody know if it's easy to color match Chevy paint?

Re: Roof support ribs caved in [Re: Miyagi] #733817
March 07th 2018 7:54 pm
March 07th 2018 7:54 pm
Joined: Dec 2017
Posts: 181
San Diego, CA
Scrojira Offline
member
Scrojira  Offline
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Posts: 181
San Diego, CA
That expanding foam crap is what Chevy used at the factory. Just glue them back up using strong adhesive, like shaggy suggests.

Any auto body & paint supply shop worth their salt will be able to match your color by using the color code and a scan of your actual paint.

Last edited by Scrojira; March 07th 2018 7:57 pm.
Re: Roof support ribs caved in [Re: Miyagi] #733838
March 07th 2018 9:48 pm
March 07th 2018 9:48 pm
Joined: Jun 2010
Posts: 13,878
Van Diego California
frscke1 Offline
frscke1  Offline

Joined: Jun 2010
Posts: 13,878
Van Diego California
That paint looks like Chevy Victory Red


SUNSHINE VANS-VAN DIEGO
ADRENALIN BY THE GALLON & CHASIN RACIN
ONE FOR THE DIRT & ONE FOR THE STREETS
'93 CHEVY G30 454 4X4 SPORTVAN EXT 146" WB
'92 CHEVY G30 454 BEAUVILLE EXT 146" WB
Re: Roof support ribs caved in [Re: Scrojira] #733840
March 07th 2018 10:23 pm
March 07th 2018 10:23 pm
Joined: Nov 2013
Posts: 2,933
Michigan
Dyno_Dave Offline
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Dyno_Dave  Offline
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Posts: 2,933
Michigan
Originally Posted by Scrojira
That expanding foam crap is what Chevy used at the factory. Just glue them back up using strong adhesive, like shaggy suggests.


The reason the manufacturer uses that "foam crap" is to allow the exterior panel some slight movement compared to the inner brace (for thermal expansion without buckling the skin). Perhaps not as critical on a van roof panel, but let the hood on your new car or truck buckle in the heat, and you'll feel differently about it.

[Linked Image]

Re: Roof support ribs caved in [Re: Miyagi] #733859
March 08th 2018 10:42 am
March 08th 2018 10:42 am
Joined: Dec 2017
Posts: 181
San Diego, CA
Scrojira Offline
member
Scrojira  Offline
member
Joined: Dec 2017
Posts: 181
San Diego, CA
I would never buy a new car or truck.

Re: Roof support ribs caved in [Re: Scrojira] #733865
March 08th 2018 2:18 pm
March 08th 2018 2:18 pm
Joined: Jan 2018
Posts: 25
CA
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Miyagi Offline OP
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Miyagi  Offline OP
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CA
Tell me about it, gotta be a damn computer engineer to work on a new car. Give me a carburetor any day.

Regarding the foam crap, Dodge used something like a rubberized plastic or firm-curing caulk to attach their van ribs to the roof. Fancy stuff that takes paint, and tougher than the GM stuff. I gotta see if it can be had anymore...

Last edited by Miyagi; March 08th 2018 2:26 pm. Reason: Got overeager
Re: Roof support ribs caved in [Re: Miyagi] #733869
March 09th 2018 4:02 am
March 09th 2018 4:02 am
Joined: Apr 2004
Posts: 1,721
Ireland
shaggy Offline
veteran
shaggy  Offline
veteran
Joined: Apr 2004
Posts: 1,721
Ireland
That sounds pretty similar to the panel adhesive I mentioned. I used the 3M brand one. It's used instead of welding on a lot of panels on modern cars. Apparently it's stronger than welding and not prone to rust.

For the roof ribs if you wanted a little more give in the adhesive (for expansion as Dyno Dave mentioned ) I would use a PU sealant like Tiger seal. That sets like hard PU rubber while the panel adhesive sets like plastic. And yeah replacing the ribs is the better way of doing it. Get a helper or two if you can ...sounds like it'd be the kinda job where you'd need to have a couple of extra hands.


79 chevy G30 cobra camper conversion.
[Linked Image]
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