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Old 01-05-2015, 09:49 PM
pippintook pippintook is offline
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Join Date: Jun 2004
Location: Niagara - Canada
Posts: 667
Default Installing windshield on 1978 Trans Am

I have the front and rear glass out of my 78 Trans Am. Car is in epoxy and window channels are nice and clean/epoxied. I cant get it to a glass shop so was thinking of installing the front and rear glass myself.

I thought this was a good video on doing a windshield install on an older GM musclecar
https://www.youtube.com/watch?v=aY1bLFKbRuA

My possible parts list would be
------------------------------
1. 3M Window-Weld Sealer, http://www.summitracing.com/parts/trm-8611/overview/ $16
2. Dual Cup Suction Lifter, http://www.harborfreight.com/dual-cu...ter-46134.html $16
3. 'DOW U-418 QUICK CURE AUTO GLASS PRIMERLESS URETHANE ADHESIVE' $22
http://www.ebay.com/itm/2-TUBES-DOW-..._Tools&vxp=mtr
- Approximate parts cost = $54

Possible Steps to install glass
-----------------------------
1. Using Suction cups (and assistant) dry fit glass. Using small blocks (at glass base) get glass centered/squared in frame.
2. Once glass centered, install two pieces of 4-5" masking tape that run from bottom of glass to cowl. Cut the tape at base of windshield with razor. Leave tape on cowl and glass. these tape pieces will be 'witness marks'.
3. Using marker (sharpie?) - go round entire glass and mark glass to show where body/glass channel is. basically these sharpie marks will be where to place dam. The dam will go just to outside of these marks.
4. remove glass from car.
5. flip glass over and prepare to install dam. using the '3M Window-Weld Sealer' in 5/16" thickness install the dam around entire perimeter of glass. Start at base of windshield and use 'sharpie' marks. The dam would be installed just to outside (ie.towards glass edge) of 'sharpie' marks.
6. cut tip of 'DOW U-418 QUICK CURE AUTO GLASS PRIMERLESS URETHANE ADHESIVE' into a 'v shape'
7. install a bead of U-418 URETHANE ADHESIVE around entire perimeter. The bead of urethane would be around 3/8" thick and would run beside the dam ...though the bead would also be partially on the dam.
8. install glass (with assistant)...align tape on windshield with tape on cowl...
move glass very slightly with suction cups as required to square/center

Has anyone used this approach of 3m window weld dam and U-418 adhesive?
Should the the 3M window weld dam be 5/16" thick? Any or tips/advice is appreciated.

 


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