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SC broken power window
'79 SC. My passenger side power window stopped working. I took apart the door and found that the glass had come out of it's rubber cradle on the regulator. If I put it back in it will obviously at some time just come out again since it is no longer tight in there. I see some rust on the metal that "clamps" the rubber. Is this a part I can easily change or should I just rubber silicone adhesive the hell out of the glass to the rubber seat?
Thanks, Adam |
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10-12-2019, 12:28 PM
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They rust, split and lose the grip on the glass. It needs to be replaced. PIA, but doable job.
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'80 RoW 911 SC non-sunroof coupe in Guards Red It's not a Carrera.... It's a Super Carrera! |
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10-12-2019, 01:51 PM
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So not worth just adhesiveing the crap out of it to the old rail and rubber?
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10-12-2019, 05:43 PM
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Join Date: Mar 2019
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RTV works just fine. Clean out the lower sash channel, clean the glass, fill the lower sash channel with RTV, then set the glass after noting the old position on the channel. Reinstall. Obviously discard the rubber, it's not needed. The repair will outlast the car.
Alternate way is to hold the glass up with tape, lower the window motor and regulator, then clean up and fill sash channel with RTV, then roll the window up to the glass. Let RTV set up and harden before operating the window again. |
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10-12-2019, 06:01 PM
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Location: Marysville Wa.
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Sikaflex 291 or 292 is the cat's ass.
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https://www.instagram.com/johnwalker8704 8009 103rd pl ne Marysville Wa 98270 206 637 4071 |
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10-12-2019, 06:14 PM
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So I should remove the existing rubber first and not seal it to that? Do I risk the glass sitting right on the metal frame and getting a lot of shock over time potential crack. a new tube of E6000 adhesive. Anyone familiar with that stuff?
Thanks |
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10-13-2019, 05:30 AM
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I'm not familiar with that product. I know that RTV and Urethane work great. There are no issues with "shock." I've done this repair literally hundreds of times over the years. Omit the rubber. It is not needed. Fill the cavity with RTV or urethane then set the glass in the channel.
RTV is available at Wal-Mart or your local auto parts store. Urethane might be a little harder to find. We set stationary glass with urethane but it's not commonly available at retail level. |
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10-13-2019, 06:55 AM
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Thanks,
I used outdoor silicone sealant. fingers crossed. |
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10-13-2019, 11:24 AM
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Quote:
 I just hadn't got around to fixing it.
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10-13-2019, 11:51 AM
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When the rail on my 78SC rusted I used a tourniquet to force the new one on; tied a piece of rope around the glass and rail with the rubber in place and used a piece of wood to wind the rope round. Gradually the glass moved into position; no need for glue.
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1959 Bristol 406 (bought in 1972; sold in 1977) 1966 Porsche 2.0 coupe (bought in 1977; sold 1981) 1978 Porsche SC coupe (bought in 1993) |
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10-14-2019, 12:07 AM
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Quote:
It works!!! Thanks John. I did it after your recommendation, gave it two days to cure then have just tried it. 291 IS the cat's ass, the bee's knees, the cat's pajamas 
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10-15-2019, 03:50 PM
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Red
Porsche
Porsche
