Front and rear windshield seal recommendations?

[tdskip]

Good morning - thanks for the chat about Orange County installers last week. Very helpful.

I wanted to ask a follow-on question about the seals as well. I'd imagine that the seals will vary by vendor. Is there any wisdom on the best front / rear seal to use?

Thanks!

[Jack Stands]

I think the Porsche ones are preferred over the URO aftermarket ones, albeit at a much higher price. My car had the windshield replaced by the previous owner using an aftermarket seal and it’s OK, but not as nice as it could be. I’d love to hear other’s real world experience as well.

[OldSpool87]

Pretty much every thread I’ve read on poor windshield fitment begins with using a non-Porsche seal. I insisted on Porsche seals be used as part of my glass out paint job and was frankly surprised that the shop was considering an aftermarket substitute to save a few bucks.

[tdskip]

Thanks guys-I'll check under the couch cushions and buy the Porsche ones

[Jgordon]

Which car? If possible, switch to the 964 screens and seals. Better, and less headache.

[tdskip]

Interesting - this is for my '74 911.

[Duc Hunter]

Originally Posted by Jgordon

Which car? If possible, switch to the 964 screens and seals. Better, and less headache.

My 89 3.2 has a 964 rear seal. It was so late in the production run it has several 964 parts on it.

That said I am fighting my front windshield seal on my '75. I so not have a dash pad in it, and the a-pillars are naked. I cannot get a factory windshield gasket to seal. I was thinking the lack of vinyl (and the clips) is not helping my gasket seal.

Can I drop a 964 gasket into a '75? Why is it better?

[O=O]

Few of tips from my windshield seal installation

1. POR15 around the frame if you have the chance..might as well
2. PLEASE buy an oem seal..I used the URO at first and my windshield literally fell off the car and cracked
3. I purchased my oem seal from Suncoast Porsche because I was paranoid after the whole incident


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[tdskip]

Will use OEM for sure.

Can we get to closure on the 964 vs 911 gaskets please?

Is there an advantage to the 964 ones?

[uwanna]

Originally Posted by tdskip

Will use OEM for sure.

Can we get to closure on the 964 vs 911 gaskets please?

Is there an advantage to the 964 ones?

Do a Google Advanced search on PP 911 Technical forum (not the horrible PP search function) and you will find many threads on the 964 vs 911 seal update. Some have had success, some less so, but it has been done sucessfully. The main problem is the metal lip that holds the seal in place is longer/deeper on the '89s and 964. The shorter lip on the '88 and earlier can present problems with keeping the windshield in place. YIKES! Of course the advantage is getting rid of that damned aluminum
trim. Another tip, you can use the 993 rear quarter window rubber seal to get rid of the aluminum trim piece on earlier cars and it looks beautiful. Good luck!

[SalParadise]

Originally Posted by O=O

Few of tips from my windshield seal installation

1. POR15 around the frame if you have the chance..might as well
2. PLEASE buy an oem seal..I used the URO at first and my windshield literally fell off the car and cracked
3. I purchased my oem seal from Suncoast Porsche because I was paranoid after the whole incident


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Do not use POR15 on anything 911 - especially if there is rust there. If there is rust in your channel, blast it and fix it correctly. POR15 is a joke. As I said, if it really worked, a real company like Rustoleum or Krylon would have made a real version of it and would sell it.

However, I do agree with not using a URO seal. Unfortunately I purchased two URO seals years ago, and will not be using them on my windshield since their master cylinder had just about killed me. Do yourself a favor and don't use URO seals.

[tdskip]

Thanks

[tdskip]

Follow-on question.

Are the Genuine Porsche and OEM the same seal? Or are they different and the one you really want the Genuine Porsche?

[uwanna]

Originally Posted by tdskip

Follow-on question.

Are the Genuine Porsche and OEM the same seal? Or are they different and the one you really want the Genuine Porsche?

Use Genuine Porsche ONLY! They are different.

[tdskip]

Got it, thanks for the clarification

[brcorp]

Thanks for the info

[UROParts]

Originally Posted by Jack Stands

I think the Porsche ones are preferred over the URO aftermarket ones, albeit at a much higher price. My car had the windshield replaced by the previous owner using an aftermarket seal and it’s OK, but not as nice as it could be.

Hi everyone, quick FYI: URO redesigned its '65-'89 911 windshield seal (911 541 225 03) about nine months ago, and the first production run of the new seal was completed about a month ago.

The redesigned seal has a new profile and the lip has been extended about 3mm to better cover the body gap at the corners. Dave at TRE Motorsports did the fit-ups for us, so it should be a nice piece. Pelican forum member 3Ddesigns911 has one of the new seals, and we look forward to him posting his review soon.

[universeman]

Here's a post I did about the old URO seal vs. the OEM seal vs the Porsche seal.

Detailed differences between aftermarket and Porsche windshield seals

Obviously the new URO seal might have a better fit. UROParts, did you also add more retaining ribs to the seal, add the second flap on the inside, and change the wide metal insert at the joint?

[UROParts]

Originally Posted by universeman

Here's a post I did about the old URO seal vs. the OEM seal vs the Porsche seal.

Great comparison between our old seal and the Porsche seal Universeman, we hadn't seen that thread. Here's your sketch from the other thread for anyone who hasn't seen it:




Here's a snapshot of our new seal during redesign, prior to the final change of extending the lip (see red arrow) by 3mm.



As you can see, the redesigned seal has:

• The correct four ridges on the outer circumference.
• The correct bottom lip that closes.
• Trim slot of the correct shape.
• It's hard to tell by the photo if the lips around the glass have the round OE profile, but visualizing the seal with the glass installed, it does appear to be bull-nosed.
• The overall length has been increased slightly, so the seal won't be stretched quite as much.
• The rubber has been softened slightly.

Will ask the engineers about the metal insert. Hopefully 3Ddesigns911 has installed his new seal, and will chime in shortly.

[pmax]

UROParts,

If anything, kudos for keeping it technical in this technical forum. I wish all vendors could do the same.

Now if you can just fix the ...