Windshield Wiper - Blade Chatter

91oldsmobile03

NUMBER: 88-T-159

CORP.REF.NO: 078308

DATE: February 1991

SECTION: 8E


SUBJECT: WINDSHIELD WIPER BLADE CHATTER/WIPEABILITY CONCERNS CAUSED BY CHANGE IN BLADE ANGLE (INSTALL SPACER)

MODELS/YEARS: 1982-88 FIRENZA COUPE


Some 1982-88 Firenza 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.

Figure 1:

CORRECTION:

Install spacer, Package # 22111290, over driver side linkage housing. See 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 (70 lbs.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