Engine Cooling Fan - Noise/Vibration

91chevy24

Number: 91-416-6B

Section: 6B

Date: SEPT. 1991

Corporate Bulletin No.: 136202

ASE No.: A8


Subject: NOISE/VIBRATION DURING COOLING FAN OPERATION


Model and Year: 1989-91 CAVALIER


Application: 1989 Cavalier with 2.8L (VIN W)
1990-91 Cavalier with 3.1L (VIN T)

Condition: Cooling fan noise (rumble/booming) is heard in passenger compartment. Vibration is felt within car through the seats, floor pan and steering wheel.

Cause: "Harmonic" vibration between the cooling fan assembly and vehicle structure.

Correction: Replace the cooling fan and motor assembly. Replace parts according to the part numbers listed in the "Parts Information" below.

IMPORTANT: Both parts MUST be replaced.

Service Procedure:

Refer to Section 6B for Cooling Fan and Motor replacement.

Note: The threads attaching the fan to the motor are LEFT handed threads.

Parts Information:

P/N 22088773 - Motor Assembly, Cooling Fan

P/N 22098789 - Blade Assembly, 6 Blades, Cooling Fan

Parts are currently available from GMSPO.

Labor Operation Number: J3400

Labor Time: .7 Hour

Add Time: .1 With Automatic Transmission