loose rear window seal

[rjf123]

Hello,

Anyone had a problem like this? The seal around the glass of the rear window in my 99 996 is peeling up. Initially, it was just the corner, but now the whole thing is coming loose. I can push it back into the groove, where it will stay for a few days, only then to start to loosen again.

It this supposed to be glued down? If so, what kind of glue do I use? Or will replacing it with a new one solve the problem? No leaks as of yet, but I have a feeling that's not far beyond. Or worse, the glass coming loose!?

Any advice would be appreciated. I've included a picture so it's clear what I'm talking about.

Thanks in advance.

Ross

[Loren]

"Using the bonding gun, apply 2-component adhesive along the cover trim of the rear window in the form of a triangular bead. Dimension "X" = approx. 15 mm

When applying the adhesive, it is essential to ensure that it overlaps.

Note: Two persons are needed to insert and adjust the rear window."

[rjf123]

"Using the bonding gun, apply 2-component adhesive along the cover trim of the rear window in the form of a triangular bead. Dimension "X" = approx. 15 mm

When applying the adhesive, it is essential to ensure that it overlaps.

Note: Two persons are needed to insert and adjust the rear window."

Thanks! But I'm not sure I get it.

What's a "bonding gun"? And "two part adhesive"? Are you saying to use 2-part epoxy that comes in the double syringe type container from the auto parts store?

And make sure it overlaps what? Surely not the edges of window and paint. Epoxy on the paint doesn't sound like a good idea.

The window hasn't shifted, as the seal has never actually fully come out. So I don't think that's a problem. I imagine I could glue a section at a time, and thus avoid the window shifting.

Thanks again.

Ross

[Loren]

I was giving you the procedure out of the manual - so you would know it was bonded.

Porsche does not say what the adhesive is - just "adhesive set" and a part number.

I am sure any glass repair company knows what to use - and likely how to fix it.

[Lee Quave]

Hello,

Anyone had a problem like this? The seal around the glass of the rear window in my 99 996 is peeling up. Initially, it was just the corner, but now the whole thing is coming loose. I can push it back into the groove, where it will stay for a few days, only then to start to loosen again.

It this supposed to be glued down? If so, what kind of glue do I use? Or will replacing it with a new one solve the problem? No leaks as of yet, but I have a feeling that's not far beyond. Or worse, the glass coming loose!?

Any advice would be appreciated. I've included a picture so it's clear what I'm talking about.

Thanks in advance.

Ross

Ross,

I have the same problem with my 99 996. Mine is only at the corner and it’s been that way for some time. Please post the result of the fix. GL

Lee

[rjf123]

Hello,

Anyone had a problem like this? The seal around the glass of the rear window in my 99 996 is peeling up. Initially, it was just the corner, but now the whole thing is coming loose. I can push it back into the groove, where it will stay for a few days, only then to start to loosen again.

It this supposed to be glued down? If so, what kind of glue do I use? Or will replacing it with a new one solve the problem? No leaks as of yet, but I have a feeling that's not far beyond. Or worse, the glass coming loose!?

Any advice would be appreciated. I've included a picture so it's clear what I'm talking about.

Thanks in advance.

Ross

Ross,

I have the same problem with my 99 996. Mine is only at the corner and it’s been that way for some time. Please post the result of the fix. GL

Lee

Thanks, I'll look into this a bit more. Maybe a glass place can do this inexpensively.

For what it's worth, Lee. The corners were coming up for about 6 months before the rest started to come loose. Just so you know about how much time you might have. My car is a daily driver, but I do keep it garaged. Not sure what effect being out in the elements might have on the speed with which the seal fails.

I'll post the final outcome.

Ross

[rjf123]

So here's what happened...

It turns out, the seal around the rear window glass is is a "double seal". This means it wraps around the glass edge on both the top and bottom surfaces. So for it to peal away as it did in my case, the two halves of the seal must be separating or tearing apart. Not just coming unglued.

To replace it properly, involves removing the glass, and reinserting with a new seal. Sounds easy enough, but apparently the glass is placed "under pressure" and everybody was in agreement that it will break on attempt at removal!

As such, the normal windshield places (you know, the ones that come to you in their truck) wouldn't even touch it. Some actually said they didn't know how to do it!!

Porsche would do it, but with no promise that the glass wouldn't break. If it did, replacement would be an extra $750.

So on the side, i said to the parts guy at Porsche, "why can't i just put silicone sealant around it, and forget it?" He replied "that's what I'd do." So that's what i did.

It looks fine. Is staying in place. And cost about $4 for the silicone.

Hope this helps other out there...

Ross

Hello,

Anyone had a problem like this? The seal around the glass of the rear window in my 99 996 is peeling up. Initially, it was just the corner, but now the whole thing is coming loose. I can push it back into the groove, where it will stay for a few days, only then to start to loosen again.

It this supposed to be glued down? If so, what kind of glue do I use? Or will replacing it with a new one solve the problem? No leaks as of yet, but I have a feeling that's not far beyond. Or worse, the glass coming loose!?

Any advice would be appreciated. I've included a picture so it's clear what I'm talking about.

Thanks in advance.

Ross

Ross,

I have the same problem with my 99 996. Mine is only at the corner and it’s been that way for some time. Please post the result of the fix. GL

Lee

Thanks, I'll look into this a bit more. Maybe a glass place can do this inexpensively.

For what it's worth, Lee. The corners were coming up for about 6 months before the rest started to come loose. Just so you know about how much time you might have. My car is a daily driver, but I do keep it garaged. Not sure what effect being out in the elements might have on the speed with which the seal fails.

I'll post the final outcome.

Ross

[Richard Hamilton]

I had a similar problem, on my 1998 C2, where the seal came loose, but didn't split. There is a TSB ("Noises in the front and rear screens" - or something like that) which shows a foam cord which packs out the void under the seal, and holds it tighter against the screen and body. It works very well. I found it after I had siliconed the rear seal to stop it moving, but used the cord on the front.

[ck986]

My 996 turbo has this problem and I ordered a new gasket. It appears the gasket slides into a Chanel in the window trim piece around the top and sides of the window and around the window bottom. The window does not need removal for the rubber component but may need removal to replace the window trim. I am going to give it a shot replacing the gasket in the next few weeks. I was thinking or replacing the trim as well as I'm sure the window will not be moving and the trim does move towards the bottom of the window. I asked the dealer but they didn't know what was required to do the job just that it would cost 500, plus parts, and the cost of a new window if it needed to be removed and it broke. It sounds like they have nothing to do and need some business. Has anyone ever taken a stab at this?

[hardtailer]

I identified my rear screen as the source for the creaking I get as soon as I drive away. I presume its the body flexing as a consequence of a screen that hasn't bonded properly to the aperture and the relative movement between the two. I used two microphones attached to the screen and listened to the amplified sound and it was indeed that what I hear without them. Prior to the screen I had them attached to the rear strut tops but they made a different noise.

As such I'm interested to read what above mentioned TSB says about the issue but haven't found it here.

 

Edited October 30, 2022 by hardtailer