GMC 1982 Light Duty Truck Service Manual page 170

2D-8 BODY
Fig. 2D-16--Removing Windshield from Opening
7. Recheck windshield in its opening and if satisfactory
proceed as follows:
Repairing and Refinishing Pinch-W eld Flange
a n d /o r Surrounding A reas
1. R ep air all m etal d efo rm ations in th e w indshield
opening area for appearance.
2. Sand to smooth surface using No. 320 sandpaper.
3. A pply p rim er - su rfa c e r (D uP on t 80 S P rim er -
Surfacer, PPG 204-1000 Red Flash Prim er or PPG
700-345 - R epair P rim e r/o r equivalent) and sand
smooth for required surface.
4. A pply color coats of 9984024 acrylic enam el (or
equivalent) catalyzed as indicated.
Installation (Fig. 2 D -1 8 )
Installation of the windshield requires a num ber of
timed (cure tim e) steps. This tim ing is im portant and must
be followed. All cure tim es are m inim um , unless indicated
otherwise. W hen perform ing a step that requires a cure
tim e, it is not necessary to stop and wait for the cure tim e to
elapse. M ake a note of the cure tim e and move on to any
following step th a t does not in terfere w ith the tim ed
sequence.
1. W ipe pinch-weld clean with a dry cloth. M ake sure
most of the previous urethan e has been removed.
2. Apply pinch-weld prim er with a new applicator to
pinch-weld as shown in View B.
Prim er m ust be thoroughly stirred and agitated prior to
application.
Allow prim er to cure for at least 30 m inutes (100 hour
m axim um ). Pinch weld flange m ust not exceed 160°F
(38°C ) at tim e of prim er application.
3. A pply rubber cleaner with a new applicator to both
channels of rubber w eatherstrip as shown in View A.
Allow cleaner to rem ain for a t least 5 m inutes (4 hour
m axim um ), then wipe both channels with a clean dry
cloth.
4. A pply ru b b e r p rim er to both ch ann els of ru b b er
w eatherstrip th a t were cleaned in the previous step and
are shown in View A. Allow prim er to cure for at least
30 m inutes (30 day m axim um ).
Thoroughly clean surface of glass to which blackout
prim er will be applied (around edge of inside surface)
by wiping with a clean, alcohol dam pened cloth. Allow
to air dry.
NO TICE: W hen cleaning w indshield glass, avoid
contacting edge of plastic lam inate m aterial (on edge of
glass) w ith volatile cleaner. C o n ta c t m ay cause
discoloration and deterioration of plastic lam inate by
wicking action. DO N O T use a petroleum base solvent
such as kerosene or gasoline. The presence of oil will
prevent adhesion of new m aterial.
6. A pply blackou t prim er to the sam e area of the
windshield glass th at was cleaned in the previous step
and is shown in View C. Allow to dry to touch.
7. Apply a 3/16 inch m inim um diam eter bead of urethane
adhesive around pinch-weld flange as shown in View B.
W indshield glass m ust be installed within 20 minutes
after perform ing this step.
8. Apply a mist of plain w ater to the urethane bead on the
pinch-weld flange, wetting it fully.
9. Install rubber w eatherstrip to the pinch-weld flange.
10. Apply a 3/16 inch m inim um diam eter bead of urethane
adhesive to rubber w eatherstrip glass channel as shown
in View D.
11. A pply a m ist of lu b ric an t to surface
w eatherstrip as shown in View D, w etting it fully.
Install windshield within 5 m inutes after perform ing
this step.
12. On windshields equipped with em bedded antenna, tape
pigtail of antenna to inside surface of windshield glass
in a convenient and accessible position.
13. W ith the aid of a helper, lift glass into window opening.
Suction cups may be used but are not m andatory.
Then, install glass in channel of w eatherstrip.
14. Apply lubricant to lockstrip channel. W indshield must
be seated prior to application of lubricant.
Fig. 2D-17--Checking Windshield Opening
" C " or