Grand AM L4-138 2.3L VIN A MFI (1992)
Camshaft: All Technical Service Bulletins
Engine - Knocking Noise At Idle With Engine Warm
Bulletin Number:
92-6-41
Reference Number:
276102R
Publish Date:
4/92
Subject:
KNOCKING NOISE AT IDLE WITH
ENGINE WARM (REPLACE INTAKE
CAMSHAFT HOUSING ASSEMBLY)
Models Affected:
1992 GRAND AM MODELS
WITH 2.3L ENGINE (VIN D)
TRANSAXLE MODELS: Automatic Transaxle Only
CONDITION:
Intake camshaft makes knocking noise during idle at normal operating temperatures.
CAUSE:
Intake camshaft knocks due to end play.
CORRECTION:
Verify that the camshaft is making the knocking noise by the following procedure.
1.
Turn A/C control off.
2.
Start engine and bring to a fully warmed up idle (700 rpm).
3.
Use the beveled end of a wooden dowel (1/2" dia. x 8" to 12" long with one end beveled) to apply moderate axial pressure (approximately 10
pounds of force) on the intake camshaft at the center of the P/S drive pulley (refer to illustration).
CAUTION:
To avoid personal injury care should be taken to place a dowel directly at the center of the camshaft; otherwise, the risk of losing control of the dowel
exists.
4.
If the knocking noise is eliminated, the noise is due to camshaft end play.
5.
Replace the intake camshaft housing assembly with service part # 24573362, which will reduce end play.
NOTE:
