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Leak in trunk at tail light bolts?

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Old 03-22-2019, 12:57 PM
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jwbeck17
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Default Leak in trunk at tail light bolts?

So I am tracking down little leaks in my cabin and noticed that there is some water in the rear cabin. Strangely enough, the drip lines look like they are coming from where the tail lights bolt to the cabin, as it is coming from the nut. Anyone seen this before?
Old 03-22-2019, 01:09 PM
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Taguid
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Yes, I have an S4 and had that problem but I got new grommets that the nut seals to from Roger and all good now.
Old 03-22-2019, 02:25 PM
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jwbeck17
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Originally Posted by Taguid
Yes, I have an S4 and had that problem but I got new grommets that the nut seals to from Roger and all good now.
totally forgot about those grommets! Just ordered from Roger. Thank you!
Old 03-23-2019, 11:34 PM
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Ron V
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I have the same problem with my 88. Do you have a link to those parts?
Old 03-24-2019, 04:24 AM
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Tails
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I use "Closed Cell Foam" which is a door and window sealant. It comes in a few colours and has an adhesive backing and it is approximately 1/4" square cross section. I stick this to the surface of the tail light where the tail light conforms to aperture in the rear bumper "plastic" section of the body. This prevent water entering the inner aperture of the bumper. Problem solved.
Old 03-24-2019, 07:59 AM
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Kevin in Atlanta
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Originally Posted by Ron V
I have the same problem with my 88. Do you have a link to those parts?
I think this is it: 99970306650
Old 03-24-2019, 11:22 AM
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jwbeck17
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Originally Posted by Tails
I use "Closed Cell Foam" which is a door and window sealant. It comes in a few colours and has an adhesive backing and it is approximately 1/4" square cross section. I stick this to the surface of the tail light where the tail light conforms to aperture in the rear bumper "plastic" section of the body. This prevent water entering the inner aperture of the bumper. Problem solved.
Actually this may exacerbate the problem, as when I removed the taillights, the stripping was there. The issue is that the stripping can age in certain areas and let water in, but the stripping at the bottom won't let the water out, creating build-up.

Old 03-24-2019, 12:41 PM
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worf928
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Originally Posted by jwbeck17
Actually this may exacerbate the problem, as when I removed the taillights, the stripping was there. The issue is that the stripping can age in certain areas and let water in, but the stripping at the bottom won't let the water out, creating build-up.
Right!

The bumper cover is plastic, the hatch tub is metal and the gap between them is where water drains from the hatch gutter and rear sunroof drains. The grommets in the hatch seal the interior from water draining from the sunroof and hatch, not from the taillight cavity.
Old 03-24-2019, 11:08 PM
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Tails
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I has my car for over 19yrs and the securing studs have the rubber grommets installed and the bottom drain holes from the aperture are clear, as are the drains from the from the hatch guttering and the rear sunroof drains are also clear, so no problems from water entering the tail light aperture from around the tail lights either..

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