Calais L4-138 2.3L VIN D FI (1990)
Harmonic Balancer - Crankshaft Pulley: Customer Interest
Engine - Snapping Noise In the Engine Compartment
NUMBER:
92-T-94
CORP.REF.NO: 276104
DATE:
June 1992
SECTION:
6A7, L4
SUBJECT:
SNAPPING NOISE IN THE ENGINE COMPARTMENT NEAR FRONT OF ENGINE
- REPLACE CRANKSHAFT PULLEY
MODELS/YEARS:
1987-92 CUTLASS CALAIS, ACHIEVA, CUTLASS
SUPREME WITH 2.3L (VIN A, D, 3) ENGINE
CONDITION:
A snapping noise in the engine compartment near the front of the engine.
CAUSE:
A static electric charge may be built up in the crankshaft pulley outer ring by serpentine belt friction. If the charge builds to a high enough level, it
discharges by arcing to the engine front cover. A snapping sound, similar to a spark plug wire arcing to ground, is created. This static build up is more
likely in low humidity conditions and with a serpentine belt which has been in use. The arcing may not be apparent at all in higher humidity conditions
and is less likely with a new belt.
CORRECTION:
Verify the crankshaft pulley is discharging to front cover. Discharge can be seen when engine compartment is relatively dark. Replace crankshaft pulley
with updated grounded outer ring crankshaft pulley. Refer to Parts Information for correct crankshaft pulley part number.
DO NOT replace serpentine belt to correct this condition; replacing the belt will only eliminate the condition temporarily.
Refer to Section 6A7 of the service manual for crankshaft pulley replacement procedure.
Parts Information:
Vehicles built after February 1992 have the updated crankshaft pulley. Refer to date on the label on the end of the driver side door.
Application
Pulley P/N
1989-91
VIN A ENGINE
24573264
1992
VIN A (WITH W41 OPTION) ENGINE
1987-91
VIN D ENGINE
24573015
1992
VIN D, 3 AND A (WITHOUT W41
OPTION) ENGINES
Parts are currently available from GMSPO.
