GMC 1982 Light Duty Truck, Service Manual

Page: 170 / 1435

2D-8 BODY
Fig. 2D-16--Removing Windshield from Opening
7. Recheck w indshield in its opening and if satisfactory
proceed as follows:
Repairing an d Refinishing Pinch-W eld Flange
a n d /o r Surrounding A reas
1. R ep air all m etal d e fo rm atio n s in th e w indshield
opening area for appearance.
2. Sand to sm ooth surface using No. 320 sandpaper.
3. A pply p rim er - su rfa c e r (D u P o n t 80 S P rim e r -
Surfacer, PPG 204-1000 Red Flash Prim er or PPG
700-345 - R ep a ir P rim e r/o r eq u iv ale n t) and sand
sm ooth for required surface.
4. A pply color co ats of 9984024 acrylic enam el (or
equivalent) catalyzed as indicated.
In stallation (Fig. 2 D -1 8 )
Installation of the w indshield requires a num ber of
tim ed (cure tim e) steps. T his tim ing is im portant and m ust
be followed. All cure tim es are m inim um , unless indicated
otherwise. W hen perform ing a step th at requires a cure
tim e, it is not necessary to stop and w ait for the cure tim e to
elapse. M ake a note of the cure tim e and move on to any
follow ing step th a t does not in te rfe re w ith th e tim ed
sequence.
1. W ipe pinch-w eld clean with a dry cloth. M ake sure
most of the previous u reth an e has been removed.
2. A pply pinch-weld prim er with a new applicator to
pinch-weld as shown in View B.
Prim er m ust be thoroughly stirred and ag itated prior to
application.
Allow prim er to cure for a t 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 w ith a new applicator to both
channels of ru b b er w eath erstrip 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 e r to both ch a n n els of ru b b e r
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.
N O TIC E : W hen clean in g w indshield glass, avoid
contacting edge of plastic lam inate m aterial (on edge of
glass) w ith volatile c le a n er. 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 b lack o u t p rim er to the sam e are a of the
windshield glass th a t was cleaned in the previous step
and is shown in View C. Allow to dry to touch.
7. A pply a 3 /16 inch m inim um d iam eter bead of u rethane
adhesive around pinch-weld flange as shown in View B.
W indshield glass m ust be installed w ithin 20 m inutes
a fter perform ing this step.
8. Apply a mist of plain w ater to the ureth an e bead on the
pinch-weld flange, w etting 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 a n t to su rfa ce " C " or
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 anten n a 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 m ay be used but are not m andatory.
Then, install glass in channel of w eatherstrip.
14. Apply lubricant to lockstrip channel. W indshield m ust
be seated prior to application of lubricant.
Fig. 2D-17--Checking Windshield Opening