Wipers - Blade Chatter

9224BUICK01

Bulletin 89-10-37

Date Mar. '91

Ref. No. 89-296-10

Corp. Ref. No. 078308


SUBJECT:
WINDSHIELD WIPER BLADE CHATTER/WIPEABILITY CONCERNS CAUSED BY CHANGE IN BLADE ANGLE

MODELS AFFECTED:
1982-89 SKYHAWKS


Some 1982-89 Skyhawk coupes may experience driver side blade chatter and wipeability concerns.

IMPORTANT:
Before doing any work, clean windshield and both blades with GM windshield cleaner, PN 1050011 or equivalent. Then, recheck wiper-washer operation. If problems persist after cleaning, follow the procedures in this bulletin.

CAUSE:

Some vehicles have a wiper housing mounting tolerance condition that changes the attack angle of the driver side blade assembly and can cause blade chatter and wipe problems.

CORRECTION:







Install spacer, Package #22111290, over driver side linkage housing (Figure 1). Make sure spacer is correctly oriented. Parts are currently available at GMSPO.

Install new screws provided finger tight, then torque evenly to 8 N-m (70lbs.in).

NOTE:
When reassembling cowl, make sure that washer hose is reconnected (and not pinched).

If an interference condition results between the wiper arm head casting and the cowl clearance hole, use a file to enlarge hole at interference point.

WARRANTY INFORMATION:

Labor Operation Number: T4677
Labor Time: 0.4 hour
Trouble Code: 92