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993 windscreens creak primarily due to poor fitting. The noise is generated by movement in the glass where it has been bonded/positioned incorrectly, or that there is little (or no) contact at all between the two contact surfaces. This is a very generalised synopsis, but other than trim frame issues, the problem - IME - is usually attributed to a poorly fitted windscreen.
Get some 100% silicone clear bath caluk. Inject it between the seal and the glass and if desired the body and the seal. Will quiet things right down. I did this once and it was the end of the issue.
I thought about the silicone caulk, but wondered if one might be inadvertently blocking drains in the windshield channel.
Originally Posted by pp000830
Get some 100% silicone clear bath caluk. Inject it between the seal and the glass and if desired the body and the seal. Will quiet things right down. I did this once and it was the end of the issue.
Mine only creaks from the rear window and only when it flexes backing out of the driveway. It doesn't creak when coming in. I find playing ZZ Top's La Grange at a high volume for 3 seconds eliminates the creak. Seriously, if it's only when I back out I've decided to leave well enough alone. But I may look into the Pedro's Ice Wax since it seems simple to do.
I thought about the silicone caulk, but wondered if one might be inadvertently blocking drains in the windshield channel.
There aren't any drains in the windshield channel. It would be nice if there were that would help prevent some of the issues with rust developing around the windshield. There's a Porsche TSB about filling in the channel for both the windshield and rear window using a polyurethane sealant. You can find the TSB here (#3 under body and interior TSB's) http://pcarworkshop.com/index.php/99...C_Parts_Guides. The sealant that they mention in the TSB has been superseded and now they use Wurth Bond+Seal. There's a DIY post here by Bruce7 showing the procedure. There have also been some discussions here about the suitability of silicone sealant for use on cars because some types of silicone sealant release some amount of acetic acid when as they cure.
I thought about the silicone caulk, but wondered if one might be inadvertently blocking drains in the windshield channel.
All you ar putting is a small bead of calk in place not pumping in a large amount. The sound comes from the rubber sliding against the glass or against the body, you are using just enough to stop the movement. Just a small bead about the size of 12 gauge insulated primary wire.
I installed the OEM Porsche rope 4 years ago and it worked perfectly but now the problem has come back. So I'm going to try the Wax, I've heard from another local 993 owner his uses Maxima chain wax. I'm guessing Pedros and Maxima are both similar products.
Since both the rope and wax are temporary solutions, I think the wax is a cheaper and quicker fix from the sounds of it.
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