Question concerning seal between tail and quarter panel.

Exterior Body, Paint, Trim, Chrome

  1. Hein4

    Hein4 Member

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    Hello there, I have an issue with the sealing of my trunk/ rear lights on my 69 Satellite.
    The tail meets the rear quarter and there is a gap between the two parts (as seen in the photo). Right now, rain would run directly to the taillights.

    Question: how should this gap be properly sealed? What stuff would go into that seam?

    The car is painted and I hope, that sealing the gap will not destroy the paint?
    Your help would be greatly appreciated!

    20220117_163259.jpg
     
  2. AR67GTX

    AR67GTX Well-Known Member

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    Are you asking about the joint between the quarter panel and the quarter panel extension? If the same as 66/67 there’s a gasket that goes between them. But it’s about 1/32” flexible back plastic and not really a weather tight seal so much. It just kind of cleans up the joint appearance. The tail light bucket gasket typically seals the tail light opening in the end of the quarter. Here’s what they show for a 69.

    https://www.detroitmuscletechnologies.com/mopar-b-body-69-roadrunner-quarter-extension-gaskets-pair/
     
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    • Hein4

      Hein4 Member

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      This should be it! Thank you very much.
      So the extension must be taken off and the gasket installed.

      On the other hand - would it be feasible to put the black caulk that is mentioned when following your link into the gap?

      Sounds like a new project for me :)!
       
    • HALIFAXHOPS

      HALIFAXHOPS MSGT(ret) and MOPAR only distributor rebuilder! FBBO Gold Member

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      If you want the paint under there to still look good, then no sealant
       
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      • Hein4

        Hein4 Member

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        Thanks for the advice.
        I will check, whether the studs will be stable enough for a removal/ reinstallation procedure of the gasket, after all I do not want to ruin more then I fixed...
         
      • Charles Cook

        Charles Cook FBBO Gold Member FBBO Gold Member

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        Gasket yes.
         
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        • AR67GTX

          AR67GTX Well-Known Member

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          I would not use caulk. It might make a mess when tightened down. I think the plastic gasket is more to slightly separate the painted pieces so they don’t rub together and chip on the edges. As I said, at least on my 66 they do not provide the seal to keep water out of the trunk.
           
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          • Nevada dan

            Nevada dan Well-Known Member

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            i think they make a foam gasket for them too, classic industries
             
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            • VFilms

              VFilms FBBO Gold Member FBBO Gold Member

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              I agree and you make a good point. They are not meant to seal as much as to protect the body parts. When I put mine back on I used a VERY thin bead of sealer toward the inside edge so I would not push out past the outer edge of the seal. Don't know if it's going to help, but what the hell.
               
            • Stanton

              Stanton Well-Known Member

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              My '69 was in original paint when I bought it and I'm "pretty sure" that joint was filled with seam sealer - same as the dutchman panel. HOWEVER, when I got the car back from paint those gaps had not been filled - and that's always bothered me. Regardless of what's wrong or right, when it gets painted this time those gaps are getting seam sealer. There is no reason not to seal them - there is no reason to have to take those extensions off or loosen them unless they tail end gets damaged - and then the sealer will be the least of your worries!

              Every show I'm at I look at those areas. I haven't come across any original paint cars. Many restos do not appear to have sealer there BUT the fit is not great so that's another reason to seam seal. Also, There seams to be a split between paint separately or in place. and there are downsides to either ... paint in place and the joint may not get good coverage. Paint separately and the paint can crack or chip as they're tightened into place.

              The gaskets are shown here - page 10:
              https://www.detroitmuscletechnologies.com/content/DMT CATALOG B BODY 66-70 ROADRUNNER.pdf
               
              Last edited: Jan 20, 2022
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              • dadsbee

                dadsbee FBBO Gold Member FBBO Gold Member

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                Remember that plastic "gasket" was in place BEFORE the car was painted at the assembly plant. I lucked out on my Bee as everything was painted in pieces and the gasket is black and doesn't really show against the Blue. A white car would be another story...

                If yours is painted and done, I wouldn't tempt fate pulling the extensions back off as if your luck is like mine this will be the time all the studs break off.
                 
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                • Hein4

                  Hein4 Member

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                  Many thanks for all the input fellows, I am very glad to get your fast and wise responses.
                  As stated above, I will inspect the studs and then decide if taking off the extension to "do it right" is worth the risk of snapping those studs. As the car is painted black, a sealer will hopefully not interfere with the looks of that color.
                   
                • R413

                  R413 Well-Known Member

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                  That gap is not a sealed gap. Water getting in there won’t hurt anything.

                  The sealing water out of the trunk is the foam gasket on the taillight bucket. The gasket where the red lens sits on the taillight bucket. Then there is a foam seal on all of the studs where quarter extension bolts go through the body.

                  the thick black gasket is not for water sealing. Look at it and that should be clear.
                   
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