GTB side windows seal

I have the same issue, now I have to wash the car with even more care.

 

Big problem when the cars were brand new. Water stained fabric at those windows on the "B" is very common.

 

Same problem for me. Also looking for a solution that doesn't cost an arm or a leg for a stupid piece of rubber.

 

It is normally the seal behind the frame where it joins the body right in the corner its just a regular door seal type material, item 14
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Actually the gasket (#17) is probably OK. It's the sealant material (called dum dum putty, made by 3M) that needs to be reapplied.

It should be applied around the glass before it is inserted into the gasket and it should be applied around the gasket before it is inserted into the window sub-frame.

Though it is interesting to hear from Brian that this is a problem with cars even when new so that tells me this is a systemic problem and any fix is temporary.

I can speak from experience that it is temporary. I did this job several years ago and last year the car was in a heavy rainstorm and sure enough I had a small leak in the area.

Oh well.

If you actually need new gaskets I have an extra pair that is in good condition that I would sell you for less than 250 euro.

-F

 

No, that's not the cause of the leak. That gasket (#14) is mostly cosmetic, maybe provides some sound deadening. But if water has gotten as far as that part then it has already entered the cabin.

-F

 

Happen to have step-by-steps on popping the window out?
Mine's been leaking for years so I try & keep it out of the water.

 

Well first off, do you own a GTB or a GTS? They are actually rather different in this area, as in, in every single way.

Edit: I see you have a 308 GTB. I did this on a 328 GTB so I am not directly familiar with how a 308 GTB goes together but I believe they are similar. Newman helped me and his experience is with a 308 so I believe they can be cross referenced.

If the 308 is like the 328 the fist thing you do is unscrew the interior trim on the 'B' pillar. This trim piece should reveal some rivets. Those rivets need to be drilled out, which will allow the sub-frame, along with the gasket and the glass to be removed as a unit to the outside.

I highly suggest getting some plastic trim tools, (ATS brand) do NOT use metal tools for this job.

I am away from my computer for a few days but once I get back home I can dig up some pictures. Also you can do a search for a thread in his section by greg328 who went through a similar job and I believe he posted up some shots.

-F

 

Thanks. I've seen it for the GTS in the archives, but little on the GTB.

 

supposedly they just push out
do a search on redoing the rear tray material
mine needs to be done but I lack the nerve to attempt the window removal

 

I'll PM you next week.

There is nothing that relates between the two.

If you do a thread title search with the terms "GTB" and "window" and/or search for threads started by greg328 you should find some pictures. These threads relate to a 328 GTB but I believe it will help you with your 308 GTB.

-F

 

I came across some of my old notes about the restoration of the windows and the name viper_driver came up and I remembered he's the one who help me out the most.

The images below are his and they of a 1984 308 GTB.

And they represent exactly what I saw on my 1987 328 GTB.

Anyway, his pictures helped me out a lot and I'm sure they will help out anyone who wants to try to fix this factory defect.

-F
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Quarter glass windows push outward from the inside and come out with very little effort. Have both of mine out of the 82 GTS at the moment. They pushed out so easily I was actually shocked and kind of laughed to myself and thought well, I bet that seals nicely LOL. What I would recommend is to separate the glass and seal, clean both up then apply a very small amount of silicone inside the channel ( at the deepest part )of the rubber where the glass sets, re-install the glass and clean any excess that you might push out. ( or use butyl aka dumb dumb putty, your choice ), then I would place the butyl around the outside edge of the rubber seal and re-install that unit into the opening making sure that after installed I press firmly two seat the butyl against the rubber and opening. If you decide you need more sealer, no problem. Simply roll the rubber edge open and place, but honestly, it really shouldn't be necessary .

Oh, and when you go to reset the unit into the opening, install the back section 1st so the portion you half to work is closer to the door and easier to access and manipulate. And it would probably be a good idea to cover the rear bench/cloth with masking tape so you don't get any of the sealer in the material as it won't come out.

 

No, not in a GTB they don't.

People please, the GTS and the GTB do NOT work in the same way in this area. They are COMPLETELY DIFFERENT. This thread is about a GTB.

But thanks anyway.

-F

 

Furmano is correct. I've been down this road, with his assistance. I needed to replace my gas flap hinges and the only way was to remove the triangular left rear quarter window frame. Lots of scraping out the black goo was a big part of it. And putting back new goo when re-installing. You can order the stuff online, I forget the brand name. I still have a bunch of it. Good luck.
Greg
87 328 GTB

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Sorry guys my mistake. I've owned a GTB QV also but never had the quarter glass out of it.

We owned a body shop for 30 years so well-versed in resealing glass.

 

When I had my 13k mile '86 328GTB this was the singular only thing that wasn't right. Wet fabric in this area when washing the car.

I bought 2 new gaskets from the dealer. Took them and the car to a glass shop. Found out rivets had to be drilled and such. They were less than excited to try that so they expertly squirted some goo in and around the glass/gasket channel. Still leaked.

Years later sold the car. Years after that came upon the gaskets still new in the packaging.

Seemed like every 308/328GTB owner in the world wanted them for the 12 minutes they were for sale lol.

 

One other thing I noticed, and this goes for either model, is that the rear glass seal is very prone to leaking water about 6" from each end on the top portion of the seal. This can in fact let water into The inside corner of the cabin and stain the material on the rear deck. Just another area to think about.

 

When I did my interior I found the channel the window frame sits in is curved, but the frame is flat on bottom. I added a foam gasket to the bottom and have not had a problem.

 

Be careful if you want to move item 17. It is a very rare part (different on both sides). Maybe you have a good connection but I haven't found any since years...