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Need advice on best way to repair tailgate leak at hinge Topic is solved

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jreed
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Need advice on best way to repair tailgate leak at hinge  Topic is solved

Post by jreed » Sun Jan 12, 2020 1:44 pm

After rainstorms, we started noticing a few drops of water coming into the left hand side of our wagon near the tailgate. The water drips down the plastic trim on the inside of the back pillar.
I put a plastic bag on the outside of the car over the roof and back left corner of the tailgate during the most recent storm, and that was effective at stopping the drops from getting in, so I'm pretty sure the source of the leak is near the hinge seal.
I removed the two plastic screws and clips that hold the left end of the rubber seal and gently peeled the strip up to get a look at the body parts underneath. There was a strip of rubber tape (not shown in photos) underneath the end of the rubber seal that came off.

I would appreciate hearing advice and experience from anybody else who has had a similar problem... what was the source of the leak and what was the best way you found to fix it? Thanks.

Volvo tailgate leak 1.JPG
Volvo tailgate leak 2.JPG
Volvo tailgate leak 3.JPG
There are some cracks visible in the sealing putty between the hinge and the body.
Could the water be entering the crack and dripping into the interior of the car?
Volvo tailgate leak 4.JPG
The seal itself is marked EPDM with part number 9154130.
Volvo tailgate leak 5.JPG
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1997 855 GLT (Light Pressure Turbo) still going strong. Previous: 1986 240 GL rusted out in '06, 1985 Saab 900T rusted out in '95, 1975 Saab 99 rusted out in '95, 1973 Saab 99 rusted out in '94

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abscate

Re: Need advice on best way to repair tailgate leak at hinge

Post by abscate » Sun Jan 12, 2020 5:10 pm

Aren’t you missing a gasket on the hinge plate?

Never mind. That rubber gasket seats down hard on my car, though

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jreed
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Re: Need advice on best way to repair tailgate leak at hinge

Post by jreed » Tue Jan 14, 2020 5:26 am

Thanks. I will check out the wiring too when I'm working on sealing up the cracks at the top of the hinge.
1997 855 GLT (Light Pressure Turbo) still going strong. Previous: 1986 240 GL rusted out in '06, 1985 Saab 900T rusted out in '95, 1975 Saab 99 rusted out in '95, 1973 Saab 99 rusted out in '94

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jreed
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jreed

Re: Need advice on best way to repair tailgate leak at hinge

Post by jreed » Sat Jan 18, 2020 8:50 am

I cleaned up the seam area between the hinge and the body, where there were lots of cracks in the putty due to age.
I used a wire brush to abrade the area and then cleaned it off afterwards by wiping and then by spraying a very little bit of acetone-based brake cleaner and wiping some more.
IMG_9179.JPG
IMG_9182.JPG
Then I applied some two part epoxy to the cracked areas all around the hinge.
IMG_9185.JPG
IMG_9186.JPG
I will reassemble the rubber seal and test out the repair after the epoxy sets up.
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1997 855 GLT (Light Pressure Turbo) still going strong. Previous: 1986 240 GL rusted out in '06, 1985 Saab 900T rusted out in '95, 1975 Saab 99 rusted out in '95, 1973 Saab 99 rusted out in '94

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jreed
Posts: 1105
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jreed

Re: Need advice on best way to repair tailgate leak at hinge

Post by jreed » Sun Jan 26, 2020 6:53 am

Quick update... we had a long and heavy rainstorm overnight. No water drops found in the car the next morning. I'll keep an eye on it (and the right hand hinge too, which hasn't leaked noticeably yet), but for now marking this request for advice "solved".
1997 855 GLT (Light Pressure Turbo) still going strong. Previous: 1986 240 GL rusted out in '06, 1985 Saab 900T rusted out in '95, 1975 Saab 99 rusted out in '95, 1973 Saab 99 rusted out in '94

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