DIY - Sealing The 993 Windshield and Rear Window
02-27-2012, 08:23 PM
#1
Racer
Thread Starter
DIY - Sealing The 993 Windshield and Rear Window
Hey Guys,
A few months ago I did the front and rear window sealing procedure on my car and took several photos documenting the task. I finally wrote up my notes and decided to post them in case someone else might want to try to do this procedure.
Just a couple of side notes. I bought my car in April 2011 with 43k miles on the odometer. I believe it has been located in Arizona and California it's entire life and was well cared for. I live in the Valley in L.A. so corrosion from the weather elements is not too big of a concern. Nevertheless, after reading about some of the nasty experiences some have had with corrosion around the window cowls, I decided to take the precautionary step of sealing the window gaps. I hope this will answer most questions about how to seal the gap, but if you have issues with corrosion, I will have to defer to others more experienced in that area.
-bruce
To prevent corrosion damage in the areas of the 993 front or rear window cowls, the gap between the glass edge and the car body should be sealed with an elastic polyurethane adhesive and sealant.
Tools and Materials
Wurth Bond+Seal, Wurth PN 890-100-2, grey, 300ml cartridge
(1 cartridge will seal 1 window, order direct from Wurth in USA 800-987-8487)
Front window outer seal, Porsche PN 993-541-925-00
Rear window outer seal, Porsche PN 993-545-225-02
Caulking gun
Painters tape
De-greaser
Q-tips
10mm socket wrench
Putty knife
Compressed air
Adhesive remover
Packaging tape
Nitrile gloves
See Also
Porsche 993 Service Manual
Porsche TSB 5106 9501 "Repairing Paint Damage Around Front & Rear Windows"
Introduction
On the 993 there is a large gap between the front and rear glass edges and the body which can collect and hold water. This can eventually lead to corrosion and costly body and paint repair. This article will illustrate how to seal the gap and prevent water from collecting underneath the outer seal and eliminate the risk of corrosion forming. Sealing the gap is a factory-recommended procedure.
NOTE: Repairing corrosion is outside the scope of this article. However, any corrosion found in the gap must first be corrected before proceeding with sealing the gap.
Photos and illustrations accompanying this article can be found at:
https://picasaweb.google.com/bruce.c...Y993WindowSeal.
See Figure 1 for a diagram of what the gap between the glass edge and the body looks like.
1. Remove 3rd brake light
Pull off cover and set aside. Remove 10mm nuts attaching light bar.
Set light bar on roof taking care not to scratch the paintwork.
See Figures 2-5.
2. Remove outer seal
Note aligning mark at top center. Loosen & remove the rubber seal.
See Figure 6.
3. Clean gap between window and body
Clean out the gap with Q-tips and a de-greaser. Then rinse out the gap with Q-tips and water.
See Figures 7-8.
4. Dry gap between window and body
Dry the gap all around the window using compressed air.
See Figure 9.
5. Mask off window and body
Apply masking tape around the window and body gap. The tape must cover the channel for the rubber seal on the window and the body must be covered where the rubber seal makes contact.
See Figures 10-12.
6. Apply sealing material
Puncture the cartridge seal and screw the application nozzle onto the cartridge. Insert the cartridge with nozzle into the caulking gun. Fill the gap between the window and the body completely with sealing material.
See Figures 13-17
7. Tool the sealing material
Wet a finger and drag it along the sealing material in the gap to create a smooth surface.
See Figure 18.
8. Remove masking tape
Remove masking tape from window and body.
See Figure 19-20.
9. Install new outer seal
Position aligning mark on outer seal at top center. Press the seal into the mounting channel.
See Figure 21.
10. Install 3rd brake light
Installation of the 3rd brake light is the reverse of removal.
Note 1
The rear window outer seal is extremely soft and easy to mark with fingernails or tools.
It is much softer than the windshield outer seal. Wear clean nitrile gloves during seal installation and press only with the finger tips. Do not stretch the seal during installation.
Note 2
Due to flex of the 993 body, you may find that a bottom corner of the rear window outer seal may pop up after entering or exiting a driveway. To solve this, secure the corner area with some of the sealing material. Tape the corner down for 24 hrs with packaging tape. When the sealant has cured, gently remove the tape and clean the area with adhesive remover.
See Figures 22-28.
The procedure to seal the gap between the windshield and the body is mostly the same as for the rear window with the following notes:
1. The windshield outer seal aligning mark is located at bottom center.
See Figure 29.
2. The outer seal is extremely hard to press into the mounting channel. It may be helpful to use the smooth
handle of a putty knife to help press the seal into the channel, taking care not to mark the rubber seal.
4. A putty knife blade can be used to help press the seal into the mounting channel. In a problem section, lift up
the seal slightly and use the knife edge to push the seal into the channel and then press down the seal to
smooth out any irregular areas.
5. The outer seal is the exact length required, do not stretch during installation.
See Figures 30-31.
There a couple of common sources of squeaks or creaks in the 993.
1. Front and Rear Outer Window Seals
A creaking sound may be heard when entering or exiting a driveway. As the body flexes the front and/or rear outer window seals may rub against the body and cause a squeak. This can be alleviated by lifting the seal and spraying all around the glass under the seal with 3M Silicone Lubricant (Dry Type) #08897 or a similar product. Periodic lubrication may be necessary. See Figure 32.
2. Door seals
In a similar situation, the rubber door seals around the top side of the window can squeak against the body when the car is moving. Spray these seals with the 3M Silicone Lubricant and eliminate the squeak. This spray can also be used to lubricate the window channel where the glass slides in the window frame. See Figure 33.
A few months ago I did the front and rear window sealing procedure on my car and took several photos documenting the task. I finally wrote up my notes and decided to post them in case someone else might want to try to do this procedure.
Just a couple of side notes. I bought my car in April 2011 with 43k miles on the odometer. I believe it has been located in Arizona and California it's entire life and was well cared for. I live in the Valley in L.A. so corrosion from the weather elements is not too big of a concern. Nevertheless, after reading about some of the nasty experiences some have had with corrosion around the window cowls, I decided to take the precautionary step of sealing the window gaps. I hope this will answer most questions about how to seal the gap, but if you have issues with corrosion, I will have to defer to others more experienced in that area.
-bruce
DIY - Sealing The 993 Windshield and Rear Window
by Bruce Carter
Rev 2-27-2012
Concernby Bruce Carter
Rev 2-27-2012
To prevent corrosion damage in the areas of the 993 front or rear window cowls, the gap between the glass edge and the car body should be sealed with an elastic polyurethane adhesive and sealant.
Tools and Materials
Wurth Bond+Seal, Wurth PN 890-100-2, grey, 300ml cartridge
(1 cartridge will seal 1 window, order direct from Wurth in USA 800-987-8487)
Front window outer seal, Porsche PN 993-541-925-00
Rear window outer seal, Porsche PN 993-545-225-02
Caulking gun
Painters tape
De-greaser
Q-tips
10mm socket wrench
Putty knife
Compressed air
Adhesive remover
Packaging tape
Nitrile gloves
See Also
Porsche 993 Service Manual
Porsche TSB 5106 9501 "Repairing Paint Damage Around Front & Rear Windows"
Introduction
On the 993 there is a large gap between the front and rear glass edges and the body which can collect and hold water. This can eventually lead to corrosion and costly body and paint repair. This article will illustrate how to seal the gap and prevent water from collecting underneath the outer seal and eliminate the risk of corrosion forming. Sealing the gap is a factory-recommended procedure.
NOTE: Repairing corrosion is outside the scope of this article. However, any corrosion found in the gap must first be corrected before proceeding with sealing the gap.
Photos and illustrations accompanying this article can be found at:
https://picasaweb.google.com/bruce.c...Y993WindowSeal.
Procedure to Seal Gap Between Rear Window and Body
See Figure 1 for a diagram of what the gap between the glass edge and the body looks like.
1. Remove 3rd brake light
Pull off cover and set aside. Remove 10mm nuts attaching light bar.
Set light bar on roof taking care not to scratch the paintwork.
See Figures 2-5.
2. Remove outer seal
Note aligning mark at top center. Loosen & remove the rubber seal.
See Figure 6.
3. Clean gap between window and body
Clean out the gap with Q-tips and a de-greaser. Then rinse out the gap with Q-tips and water.
See Figures 7-8.
4. Dry gap between window and body
Dry the gap all around the window using compressed air.
See Figure 9.
5. Mask off window and body
Apply masking tape around the window and body gap. The tape must cover the channel for the rubber seal on the window and the body must be covered where the rubber seal makes contact.
See Figures 10-12.
6. Apply sealing material
Puncture the cartridge seal and screw the application nozzle onto the cartridge. Insert the cartridge with nozzle into the caulking gun. Fill the gap between the window and the body completely with sealing material.
See Figures 13-17
7. Tool the sealing material
Wet a finger and drag it along the sealing material in the gap to create a smooth surface.
See Figure 18.
8. Remove masking tape
Remove masking tape from window and body.
See Figure 19-20.
9. Install new outer seal
Position aligning mark on outer seal at top center. Press the seal into the mounting channel.
See Figure 21.
10. Install 3rd brake light
Installation of the 3rd brake light is the reverse of removal.
Note 1
The rear window outer seal is extremely soft and easy to mark with fingernails or tools.
It is much softer than the windshield outer seal. Wear clean nitrile gloves during seal installation and press only with the finger tips. Do not stretch the seal during installation.
Note 2
Due to flex of the 993 body, you may find that a bottom corner of the rear window outer seal may pop up after entering or exiting a driveway. To solve this, secure the corner area with some of the sealing material. Tape the corner down for 24 hrs with packaging tape. When the sealant has cured, gently remove the tape and clean the area with adhesive remover.
See Figures 22-28.
Procedure to Seal Gap Between Windshield and Body
The procedure to seal the gap between the windshield and the body is mostly the same as for the rear window with the following notes:
1. The windshield outer seal aligning mark is located at bottom center.
See Figure 29.
2. The outer seal is extremely hard to press into the mounting channel. It may be helpful to use the smooth
handle of a putty knife to help press the seal into the channel, taking care not to mark the rubber seal.
4. A putty knife blade can be used to help press the seal into the mounting channel. In a problem section, lift up
the seal slightly and use the knife edge to push the seal into the channel and then press down the seal to
smooth out any irregular areas.
5. The outer seal is the exact length required, do not stretch during installation.
See Figures 30-31.
Some Tips for Stopping Squeaks
There a couple of common sources of squeaks or creaks in the 993.
1. Front and Rear Outer Window Seals
A creaking sound may be heard when entering or exiting a driveway. As the body flexes the front and/or rear outer window seals may rub against the body and cause a squeak. This can be alleviated by lifting the seal and spraying all around the glass under the seal with 3M Silicone Lubricant (Dry Type) #08897 or a similar product. Periodic lubrication may be necessary. See Figure 32.
2. Door seals
In a similar situation, the rubber door seals around the top side of the window can squeak against the body when the car is moving. Spray these seals with the 3M Silicone Lubricant and eliminate the squeak. This spray can also be used to lubricate the window channel where the glass slides in the window frame. See Figure 33.
