windscreen mystery. Help!!

[ezl]

Hi everyone.

I have a 911 1977 coupe I bought in the Us. and imported to Israel.

The windscreen was realy bad, wrong measurements too, so when i dismanteled the car, i thought it was a good idea to replace it.

meanwhile, it wasnt.

I couldnt find one here and i was afraid to order so it wont break. someone offered to cut one up especialy. fulishly enough i took the offer, payed a fortune, well, i guess it did hold for about 2 weeks.

Then, i contacted a supplier in the Us. he assured me it wont break on the way, i insured it in any case, and yes there was a cost to that too

It arrived, in one piece. I installed it and it popped out twice. Then i put it next to the frame, it was 3 cm short.

I tried to contact the seller but i cant get a reply (dont want to say his name yet, maybe he is on a LONG vacation or something) but i cant understand what went wrong.

The frame measures 63 cm hight, the window measures 60 cm. as far as i know it should be 61.5 is it correct?

So my question is as follows. does anybody know what is the original measurements for a 77 coupe windscreen? is it realy a problem with the windscreen itself? if so, i would appriciate a recomendation for a trustworthy supplier, hpefully not too expensive, and a good make that is willing to ship it (for the 3rd time!!)

For now i can only drive the car with gogles. its a nice idea - fresh air and everything, but not very legal. with 2.7 its not fast enough to get away from the cops...

Please help me out here.

P.s. the make is FYG. did anybody have a similar problem with them?

Thanks

Eitan

[Zeke]

I think your problem is with the seal you are using. Search here on how to install the glass. You need to put the metal trim in before installing the whole unit. You could even be putting the glass in the wrong slot in the seal. I think I got confused for a moment on that.

[ezl]

Thanks, but i dont think it is the case here.

I didnt even try to do it myself, i gave it to a specialist who tried everything possible, eventhough there wernt too many options. 3 cm gap is a realy big one.

I also purchesed a new seal and sent it here, so it is not a case of an old seal either.

[911K]

Originally Posted by ezl

Thanks, but i dont think it is the case here.

I didnt even try to do it myself, i gave it to a specialist who tried everything possible, eventhough there wernt too many options. 3 cm gap is a realy big one.

I also purchesed a new seal and sent it here, so it is not a case of an old seal either.

Are you using a genuine Porsche factory seal? The aftermarket seals are not accurate reproductions.

[Danny_Ocean]

Are you installing the metal trim within the seal? "Specialist" doesn't mean doo-doo IMHO.

[Britwrench]

It's probably the wrong windshield.

The correct one (tinted) is 911 541 101 01.

[ezl]

The seal is indeed an OEM, i cant say that it doesnt look as though a factory one will not be more accurate, but still it is pretty much o.k., and in the rear it did the job perfectly. the rear window is original.

To the guy who gave me the part number: thanks, but asd my window is a replacement, unfortunately this doesnt tell me much. i need the original measurements, especialy hight, of 77 coupe to mach them against my window, does anybody have this???

[ezl]

anybody?........

[ossiblue]

Can't help with the exact measurements but the windscreen size is the same for 911's from 1966-1984, I believe, so there is nothing special about the 77 model year. Surely there should be a windscreen available to you without going to extremes, though your location may make it more difficult for you.

By the way, where did you get the 61.5 cm measurement for the windscreen? Just curious as not too many of us bother to take the measurements--we just pop in a replacement windscreen that was marketed as the correct size.

[snbush67]

I don't know how accurate it is but this one shows the measurements;

[ezl]

Thanks for the reply and the diagram.

I tried to order a windshield from carglass here. as the coupe and targa have different windshields, and as he ordered 928 windshields also he asked me to take measurements. 61.5 was the only one which seemed right.

When you live in the US you can pop in a replacement...here it is more complicated.

It is funny and even more confusing, but the diagram shows 23.03, this is about 59.7 cm...

More help, please...if someone has a dismanteled windshield he know is correct and can measure it, this will be great.

I still cant figure this out. when we put the windshield next to the frame there was a huge gap. i dont believe anything can closr this properly. as my car is a rustfree, perfectly original car, there cant be anything wrong with the frame either.

Thanks, and i will apriciate further help.

Eitan

[ossiblue]

It's already been mentioned, but be absolutely certain you have an OEM seal! They are not cheap but are an absolute necessity for a non-leak fit.

[snbush67]

Eitan,

Do you have any pictures of the glass, seal and trim pieces you have? If so than post them.

Do you have a part number of the glass and manufacturer?

As mentioned above your glass should have the seal and trim mounted like the picture below before you try to put it in the frame.

[Fritz Peyerl]

windshield opening on my 72 T is 63.5 cm
windshield opening on 66 912 is 63.7 cm

windshield on both cars are 60.5cm

OEM gasket thickness between glass and resting on metal frame is 0.85 cm
double that and it comes to 1.7cm add that to the windshield height of
60.5cm and the total height is 62.2cm.

that will be just perfect for filling your opening.

hope you understand my math and explanation

OEM gasket is important and installing the metal trim before installing window is essential. The metal trim, is the part which locks the windshield to the car and stops the seal from flexing. Lot's of window installers think the metal lock trim goes on after the window is installed, Porsche windows are not like the old American cars or some old European cars.

Fritz

[Keith Perry]

Final fitment after roping the whole assembly in is to use a curved piece of wood (shaped to the curve of the inner corner of the trim) and gently tap tap outward until the gasket stretches a bit and the outer lip of the gasket seats. I've done my windshield twice this year and this method takes care of gaps. A search here will give you the original author and details.

[DasBoot]

Originally Posted by ezl

I tried to order a windshield from carglass here. as the coupe and targa have different windshields, and as he ordered 928 windshields also he asked me to take measurements. 61.5 was the only one which seemed right.

It is funny and even more confusing, but the diagram shows 23.03, this is about 59.7 cm...

The seal is the same, coupe/targa/convertible (911-541-225-03-M260).

Is your "carglass" guy custom-making a windshield or ordering you one from a manufacturer?

You have yet to tell us if the metal trim is being inserted in the seal before installation.

The 23.03" in the diagram appears to be the top-to-bottom distance between the rubber trim when installed.

[ezl]

Thanks everybody

This was some realy usefull information here.

I spoke to the glass supplier, after chacking a few things with him, (by the way, the glass maker is FYG) combined with the very usefull information here, it seems that 60 cm is pretty much the correct size.

So the problem must lie alsewere.

First the seal: not being totaly familiar with the experts lenguage and terms, i had somehow thought OEM means replacement... the answers i got here showed that there was something wrong with this asumption...so i guess it means original. mine is not.

One other thing is that the metal pieces are very bended, so my instaler told me that putting them this way may actualy break the glass when if they move, rather then hold it in place. instead he put a wide rubber strip, especialy made for this purpose, it streched the seal out realy well.

So now the question is very simple: can it be that a replacement seal, which should have been made especialy for this car can be that bad???!!!! i gues leeks are possible, but is it possible that it totaly fails to keep the window in its place??

As these cars are realy rare here, i must make a reminder that i will not be able to find other metal pieces in Israel...So i must do it differentaly as they are so flexible that if i buy others, any shipment will bend them too.

Thanks again, anybody with similar experience with replacement seals?

Eitan

[ezl]

just a follow up about the seal: It is OEM bought from "pfc groton" on ebay and cost 35$ sounds logical?

I can indeed see it is not perfect. but it does look like something that ought to do the job. anybody knows these?

[DasBoot]

OEM = Original Equipment Manufacturer

$35 ain't going to get you an OEM seal. About $61.25 here.

Yes, a poorly made seal can be causing all you describe.

"FCP GROTON" sells aftermarket seals ("Guaranteed OEM quality and Fit"), not OEM.

[Britwrench]

Targa and Coupe glass are the same.

You can usually straighten the chrome strips; put the rubber seal on the glass and carefully make the strips fit into the seal. It takes time but can be done. When they fit the strips can be installed into the seal and the whole lot put into the body frame.