Pic without headliner

[scottryana]

This is probably a long shot, but I was out messing around with my black LX today and it has the headliner removed and the sunroof was removed, looking at the roof and ribs from front to back I noticed quite a few of them were not tight to the roof and had a 1/4" gap with what looked to be old panel adhesive residue. Does anyone happen to have their headliner out or pics from when they had their headliner out. I am curious if they are supposed to be separated like that or if I need to figure out someway to shoot some panel adhesive between the two and squish them back together.

 

[Fj81]

Damnit! Im on the road now. Mine is out! Only pic I have is this one.

 

[scottryana]

Thanks for trying! Yeah it is kind of hard to tell, that back support does look a little off of the roof though, not sitting tight against it.

 

[retrofive]

Search here sucks, but I know there is a thread with all that info and detailed pics. Having trouble locating myself.

 

[Fj81]

Thanks for trying! Yeah it is kind of hard to tell, that back support does look a little off of the roof though, not sitting tight against it.

I seem to recall thinking that I should put some dynamat between there at the time because of the gap. Too bad I didnt take clearer pics.

 

[Yellow Jacket]

Not a great pic but from my LX

 

[BJANDCJ]

About a year ago, I started to notice a rattle coming from the roof. I could not figure it out so eventually I pulling the headliner. The panel bonding adhesive had failed and one of the support ribs had separated from the roof. I sourced some new PBA from 3M and added a layer of dynamat. No more rattle

 

[Marine7]

I’ve had mine out before, and I Shot some expanding foam sealant into the gap. If you use the expanding stuff be very..... very careful! If you overfill it at all your going to end up with a hump in your roof! I’ve been using this garbage for 30-35 years..... since it came out. Works great though.

 

[Malleus]

No, there's not supposed to be a gap there. Anything you stick there will do the job.

 

[bugsnbikes]

I had mine out for the sunroof delete. same thing- lots of delam on the stock materials.

I ended up spraying the whole roof with Lizard Skin ceramic which reattached the ribs to the roof. Quieted things down alot and on a full sunny 100deg. day the heat transfer is noticeably minimized. additional bonus was it sealed up any pinholes on the welded up sunroof hole/patch panel. im about to get another gallon and will shoot the floor/rear heater delete and firewall area to keep firewall heat and exhaust heat at bay.

I liked it so much that i ended up doing the same lizard skin ceramic to my 40 top (albeit a thicker coating)and it works even better.

 

[dirtyboots]

These pics look like the same roof but are one FZJ and one FJ..looks like there’s a bead of adhesive on the lowest portion of the skin


FZJ80:

FJ80:

 

[scottryana]

Yeah that is the same kind of "delamination" that I am seeing in my truck. I didn't notice any noise when the headliner was in place, but once the headliner was out it makes a terrible noise. I guess I will need to clean it out and get some kind of panel bonding adhesive. The expensive part is the adhesive gun!! Some of the guns are $200-300+ while the dual adhesive tubes are only like $40-70.

 

[dirtyboots]

Yep I found a smaller version of the 300$ gun that uses a smaller container of the 3m stuff..if you can’t find it holler and I’ll dig it up and post the nomenclature

 

[scottryana]

Doing a little more research it looks like the bow and roof panel are not supposed to be bonded but there is an NVH substrate to put between the two. I will be ordering PN 04274 and giving it a shot.

From 3M
"Roof Panels: Adhesive should be applied around the perimeter of the roof panel. To replace the factory-applied NVH foam/spacer between the roof bow and the roof panel, use one of the following:3MTM Urethane Seam Sealer (PN 08360, PN 08361 or PN 08364),3MTM MSP Seam Sealer (PN 08369 or PN 08370), or 3MTM NVH Dampening Material (PN 04274) to the roof bows as needed."

 

[retrofive]

This is the thread I was thinking of.

Headliner and sunroof pulled to fix leaks if anyone wants pics!

 

[Golgo13]

Should be ~3-6mm gap between the Roof panels and the ribs. The adhesive is the same anti-flutter stuff used on the hood.

 

[scottryana]

Thanks for the confirmation.

After doing a lot of research and finding that bonding or foam are both wrong for this application .This is what I am going to use.

https://multimedia.3m.com/mws/media...a-sheet-3mtm-nvh-dampening-material-04274.pdf

Should be ~3-6mm gap between the Roof panels and the ribs. The adhesive is the same anti-flutter stuff used on the hood.

 

[Golgo13]

yeah, the Collision Repair manual calls out "Body Sealer," but what you selected should be fine.
it doesn't add to strength, just keeps the noise down.

 

[scottryana]

Huh I wonder if my truck has had the roof replaced at some time? Haha. All the spots that should have body sealer, have kind of delaminated. Probably not, but just seems odd. I don't think my other truck has but it is kind of impossible to tell without dropping the headliner. But I was really surprised how noisy it is without a headliner in.

 

[bugsnbikes]

the roof is like a big drum. the more you can do to add some mass/sound absorbing between the headliner and roof the better. id say the headliner addresses about 60-70% of potential noise reduction......and theres alot more to go. and theres even more potential to get at sun/heat transfer.