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Windshield Replacement: '85 928S

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Old Apr 20, 2006 | 01:29 PM
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Default Windshield Replacement: '85 928S

Hey gang,

Searched the forum and got some good info, and also read the manual , but a a couple of things are not clear to me.

1. Does the windshield have a rubber gasket/seal that goes around the entire windshield? (doesn't look like it has one)

2. Glass primer and adhesive: The manual mentions a glass primer and adhesive. Can I get these at any auto parts place, or would you recommend contacting one of the 928 vendors to get their recommened primers and adhesives (if they offer them)?

3. Rear view mirror install: The manual says to use: Cleaning solution, Primer, Cover sheet, Activator, Adhesive. So, same question as above. Can I stop by my local auto parts store and get necessary stuff, or do I need some specific primers, adhesives, etc?

And any other tips would be appreciated. Thanks!

Ed
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Old Apr 20, 2006 | 01:35 PM
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Clean the area for the rear view mirror very good and go to your locol auto parts store, or even wal-mart and you can purchase "Mirror Glue" I have a bottle laying around somewhere, Loctite makes it.
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Old Apr 20, 2006 | 01:36 PM
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Is this really a job you want to attempt? I was under the impression this is a job best left to pros.
Glenn
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Old Apr 20, 2006 | 03:02 PM
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Some here have DIY'd windshields themselves. Dan Brindle rebuilds these cars bolt-by-bolt, and I know he has done it. I have just watched the pros do it. The good ones have a talent for putting down a consistent, fat bead of adhesive.

1. There is no rubber gasket. There are two small rubber spacer blocks at the botoom of the glass that you must re-use.

2. Not sure where you get the primer or the urethane adhesive (comes in a regualr caulking gun tube). Sorry. Also, if you see mention in the WSM of a Porsche kit, ignore it. The kit, although avaliable, uses outmoded adhesive methods. Urethane has replaced the rope style caulk in the kit. Cleaning and primering is critical. The pros do that while the mirror dries.

3. The mirror reattachment is done with a kit available at any auto parts store.

So, where did you get the windshield? What did it cost.

I've heard of pro installed aftermarket windshields for less than $200 total. In my area it's over $300, and be careful as they are using inferior Chinese glass. I mean REAL inferior. Usable but wavy due to the low-cost manufacturing process. If you are shopping for a windshield installation, try to determine to brand they will use beforehand. PGP (South African) is OK. - Correction, it was PGI and then Pilkington. Both good. The Chinese glass was XYG and not so good but I'll live with it.

Last edited by Bill Ball; Apr 20, 2006 at 08:29 PM.
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Old Apr 20, 2006 | 10:14 PM
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I'm looking at a DIY windshield replacement on my own car. I've got a friend who has done it before to help us, but I haven't discussed details much yet. I'm curious about the priming bit... can you elaborate on that? What do I prime, any special primer etc...
Thanks!
Simon
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Old Apr 20, 2006 | 10:56 PM
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I posted this in a thread last October. FWIW ---

I had gotten quotes from a few different glass companies, including Safelite. I took the recommendation from my neighbor and called up Triumph Auto Glass. They originally quoted $238, but price matched a "discount glass" shop, and matched it to $198. They came out to my house and installed the new glass for $198 out the door. Also took the guy about 3x as long to install because of the old type of adhesive on the window. But now everything looks great. I would check them out if I were you! I am very happy with the quality.
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Old Apr 20, 2006 | 11:23 PM
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Bill Ball wrote:
"... I have just watched the pros do it. The good ones have a talent for putting down a consistent, fat bead of adhesive. "


The last pro I watched achieving that consistent bead did it with a battery-powered caulk gun. What a great tool! How hard to find and overpriced! How amazing that lots of guys who use a lot of caulk have never heard of them! And this fellow had had to buy his own, it was not provided by his employer, the big auto-glass company. I don't remember the brand.

If anybody finds a good one for ~< $50, I'd buy it.

http://www2.northerntool.com/cat-1/766791.htm

http://www.toolbarn.com/category/cordcaulking/

http://www.thepartsbin.com/cartools/...gun-291-d.html

http://www.albioneng.com/index.asp
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Old Apr 21, 2006 | 01:01 AM
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My guy did it with manual gun and from about 3 feet over the channel, like the waiters in the Moroccan restaurants pouring tea. Maybe he was just showing off, but he laid down a perfectly uniform rope of urethane.

Also, he had no trouble getting the old glass off. He ran around the edde of the windshield with a 90 degrees bladed cutting tool that completely separated the glass from the adhessive in no time, lifted the glass off and made quick work of the adhessive underneath.
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Old Apr 21, 2006 | 01:07 AM
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I used a caulking gun when I did mine. Let me tell you, my forarms were screaming by the time I got all the way around the windshield frame. That urathane is some haard stuff to squeeze out of the tube. I got my adhesive at my local Napa. No leaks yet.
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Old Apr 21, 2006 | 01:49 AM
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Some of the rethane adhesives are supposed to be heated before dispensing. Perhaps that is what you got Jim.

For the DIY guys, here's a source of adhesive and primers.
http://www.windshieldsupplies.net/xc...e-p-16134.html

http://www.windshieldsupplies.net/xc...r-p-16139.html
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Old Apr 21, 2006 | 03:36 PM
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Thanks for the excellent tips and comments guys!

Is this really a job you want to attempt? I was under the impression this is a job best left to pros.
Yes. I think with enough information, time, and patience it will be fine. Plus I've heard of some "pros" fouling up the install. Plus I like learning how to maintain the car myself.

So, where did you get the windshield? What did it cost.
I got a green tinted, antenna in glass, Safevue brand windshield from:

ProSource Glass International
Andover, MA 01810
Tel:877-345-2800

Price was $555.75 - delivered to a local business address
(Glass: 375, Crating: 25.00, Shipping: 135.75)

A PacNW lister recommended them. They do ebay auctions, but I just called them up and asked if they could get me the windshield at the same price as they got my buddies, they said no problem. They were very easy to deal with. The glass arrived fine and it looks good.

I'm curious about the priming bit... can you elaborate on that? What do I prime, any special primer etc...
Since I haven't done it before, I'm no expert, but I believe the priming bit refers to priming the metal of the window opening area before you lay down the bead of adhesive. I read reports of the old adhesive being very difficult to strip. A general rule of thumb for any application of adhesives and sealants is to have a nice clean surface.

So, I'm anticipating have to mechanically strip the old adhesive, and then applying some type of primer to the metal to help protect the metal long term, and also to prep it for application of the adhesive.

I'm also seeing about lining up some local 928'ers to come by and offer moral support. If we can, we'll snap some photos and post the saga.

I'll let you guys know how it goes.

Again, thanks for the info, its much appreciated.

Ed
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Old Apr 22, 2006 | 12:04 AM
  #12  
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The job is actually pretty easy to do. Basically all you are doing is glueing in a piece of glass. Yes the old adhesive is a pain to get off. That is the worst part of the whole job. Go to a glass shop and ask if they will sell you the adhesive, and give you some tips on using it. I'm sure you will get the info you seek. As Bill said, make sure you put in the little rubber spacers at the bottom of the windshield. These keep the glass from sitting on the metal of the car. It will crack over time if you don't use them. I did a few test fits with mine before I put the adhesive on just to make sure it would fit. Go for it!
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Old Apr 22, 2006 | 01:26 AM
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Thanks for the encouragement G man. That's pretty much what I was thinking. As long as I take my time, and get some help from some folks that can help me get the trim pieces off without destroying them, it will be fine.

And I just stopped into a local windshield replacement shop today and they were great. They sold me a little "kit" of the urethane adhesive, primer, and windshield cleaner. They also gave me a quick education on the process. They couldn't have been any nicer about the whole thing.

He did pointedly ask me though:

Are you doing this yourself?
Have you ever done this before?

And lastly:
Are you sure you want to do this?

Ha ha...

Total charge for the kit: $15! I gave him a $20 and said lets call it even and thanked him for all the tips.
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