Caprice V6-262 4.3L (1987)
Wiper Arm: All Technical Service Bulletins
Windshield Wipers - Chatter/Wipe Unevenly
Number:
87-104
Section:
8E
Date:
April 1987
Subject:
WINDSHIELD WIPERS CHATTER AND/OR WIPE UNEVENLY
Model and Year:
DOMESTICALLY PRODUCED PASSENGER CARS
TO:
ALL CHEVROLET DEALERS
Some vehicles may exhibit a condition where the windshield
wipers chatter and/or wipe unevenly. Several items may
contribute to this condition. To completely repair this
condition, all applicable items covered in this bulletin should be checked and repaired as necessary.
Clean Windshield Glass
Clean windshield glass with GM glass cleaner, Bon Ami
(Trademark), or equivalent. The cleaner used should be one
which will not harm paint finish or scratch glass. The
glass is cleaned when water no longer "beads up", but "sheets" across the entire glass surface.
Clean Wiper Blade Elements
Remove wiper blade assembly from wiper blade arms. Clean
Rubber elements with a cloth which has been saturated in a
solution of 50% water and 50% GM Opti Kleen, or a solution
of 50% water and 50% methyl alcohol. Rinse blade
assemblies with water and reinstall on wiper arms.
FIGURE 1 - WINDSHIELD REVEAL MOLDING
Check Fit Of Windshield Reveal Molding (Figure 1) on vehicles equipped with depressed park (hidden) wiper blades and a windshield lower reveal
molding, check the fit of the reveal molding across the base of the windshield. The lower reveal molding must fit uniformly along the glass surface to
allow the wiper blades to move freely from the glass wipe area to the park position when the wipers are turned off. Gaps in excess of 1.0 mm (.040 in.)
should be corrected using the following procedure.
1.
Remove both wiper arm assemblies.
2.
Remove self drilling screws which retain the reveal molding.
3.
Clean the underside of the lower reveal molding and the windshield glass. Remove any obstructions which prevent the reveal molding from
matching the glass contour.
4.
If necessary, the lower reveal molding should be reformed as required to improve the fit. Care should be used to prevent marring the molding
surface.
5.
Reinstall the lower reveal molding using new selfsealing screws (P/N 20564495) starting with the center screw and work outward. Use