The Russian

I'm having a rust spot repaired around my from windscreen. The bodyshop (who have a good reputation) have said a couple of things that have worried and confused me.
1. To do a proper job they want to remove the front (I agree) and rear screen. Is it really necessary to remover the rear screen?
2. They said they would use the old rubber seals, surly new ones would be better. I cannot see how the windscreens can be removed without damaging the rubber.
3. Our windscreens are bonded (glued) is that correct.

Your input would be appreciated.

DaveK

I don't understand why they need to remove the rear screen to repair rust around the front screen. Did they explain why?

Don't use the old seals - unless you want leaks. Buy new ones.

As for whether they are bonded or not...... that is an age old debate. I believe they should be bonded - and the manual says they are bonded - but many UK windscreen repair centres don't seem to bond them.

Christer

When they remove screens it can sometime sbreak the screen especially the rear. I had a few rust spots front and rear and had the bodywork people remove both screens and claimed against Autoglass for both screens on my insurance. I used new seal front and rear, they are not expanisve and I got Porsche ones from Type911. My screens are not bonded, the installers insisted that they are not bonded, and in any case I couldn'f find anyone who could come up with what sort of bonding material was to be used or where to get it so I went without. I have no leaks that I am aware of, and the screens seem to fit well wth no creaks.

I guess its your call!

The Russian

To blend the repair they have to spray over the roof and down the side pillars. I've taken the car to 2 other bodyshops who said exactly the same thing. If they remove the rear windscreen they will hide any overspray. I would have thought you could lift up the rubber and spray to the edge.

Christer

Yep, thats sounds like normal procedure IMO. I needed the screen out at the rear anyway as that is where the worst rust was, but when they paint the roof and around then they like to take the screens out to do a proper job. As I said, you should be able to get the screens swapped on your insurance in any case, so I would do it that way.

DerkBarrington

I am going through the same repair work on my C4. It is important that the wind screen be removed not only to ensure a proper paint application but more importantly to ensure that all the rust is removed. A small rust spot on the edge of the rubber seal can be much more serious (requiring new metal) under the winde screen.

Richard Curtis

I just had my windscreen (windshield in the U.S.) replaced due to a huge stone chip. Luckily for me, insurance covered the full cost. The installer reused the rubber molding, and quite frankly I couldn't tell it had ever been removed. The installer said that once the windscreen was removed, they spray some rust-resistent primer into the channel. He said they've replaced several 911 windscreens and he was familiar with the 964. He said that their previous experience indicated that scratches in the metal (through the paint into the galvanizing) usually exist in the channel due to factory installation, which -- he said -- eventually will lead to rust. He found some scratches in mine although no rust. Job took exactly one hour and is guaranteed for the life of the vehicle.

Bill Gregory

This is one area the Porsche Factory Manual is pretty detailed on, section 64-1 of Volume 5, Body, and it includes the use of adhesive sealant. The adhesive sealant is part number 999.915.400.40.

GT9111

wow!! what are the odds? I also took my car to the dealership last week to repair a rust spot beneath the rubber trim of the front windshield. I agreed with the sales rep's advice to use a new rubber trim since the old trim could lose its rigidity and tightness once removed and reapplied, allowing water to permeate through and collect again.

But, I did not agree with him that a new windshield was required. Yes, there are several chips scattered around the glass, but which 14 year old car with an original windshield does not have such imperfections?

Russian, where is the rust on your car? If the rust is located on the roofline, maybe your mechanics are correct about removing the rear windshield to spray the whole roof.

Marc Shaw

Where are you getting this done? Halifax Coachworks? Did you get it done yet and how did it turn out? I've a rust spot at edge of rubber seal so need this done too.

Thanks....Marc

kris

Pretty amazing that our cars all seem to get affected sooner or later. I also discovered a tiny spot just at the seal on the roof. Invisible to 99% procent of the population but to me it looks like a large pimple on the nose of a beauty queen.

Dunasso

Not to be a herd a** but aren't these cars suppose to be galvanized so they don't rust? Hasn't Porsche been in this process sence the seventies? I also was under the impression that they had one of the very first galvanized Porsches on display, in the nude(without paint), enduring the elements. Is this right, or am I mistaken.

Duncan

PS, my car has a bubble under the paint, by the edge of the f/windscreen gasket in the lower left corner. I was going to fix it this summer, while renewing the top.

Carl Muckenhirn

Galvanization = won't rust (as quickly). We've all had galvanized garbage cans, they rust in about 5 years if kept out side. Now if we doused them with road salt as well...

16 years before rust shows up is pretty good (at least that's my case, goes in for a complete re-spray this summer). I've got windscreen, re-window, and little spots in all 4 corners where the wing meets the various rubber bits.

c.

Dunasso

I agree C.

But, I just repainted my ride in 2001. At the time I did not notice any problem and there is no road salt here, where I live. Who knows, It will be fixed this Summer anyways.