HVAC Blower Motor - Whine
Number: 93-199-8ASection: 8A
Date: MAY 1993
Corporate Bulletin No.: 331206
ASE No.: A7
Subject:
HVAC BLOWER MOTOR WHINE (REPLACE ISOLATOR AND FOAM SEAL)
Model and Year:
1992-93 CAPRICE
APPLICATION:
1992 Chevrolet "B" Car 1993 Chevrolet "B" Car before the following VIN breakpoints:
ARLINGTON: PR114845 WILLOW RUN: PW124409
CONDITION:
Some vehicles may have a whining sound when the blower motor is operating in low blower mode.
CAUSE:
The blower motor isolator does not isolate blower motor vibrations from the air conditioning module satisfactorily.
CORRECTION:
Replace existing isolator and foam seal with softer isolator. Fasteners must not be torqued over the recommended specifications, 1.9 N-m (17 lb.in.), or the effect of the isolator will be negated. Use P/N 52465887. Disregard the number stamped on the isolator, refer to packaging to identify the correct part number.
For 1992 B-cars, refer to Section 1B, Page 21 (Blower Motor and Fan Replacement) for procedure.
For 1993 B-car, refer to Section 1B, Page 23 (Blower with Impeller Motor Assembly Replacement) for procedure.
PART AVAILABILITY: Parts are expected to be available on 04/26/93.
WARRANTY INFORMATION: Labor Operation: T1946
Labor Time: 0.4 Hr.