Engine - Cam Gear/Force Balancer Replacement
88chevy21Number: 88-287-6A
Section: 6A
Date: JULY, 1988
Subject: FORCE BALANCER REPLACEMENT WHEN CAM GEAR
TEETH ARE DAMAGED
Model and Year: 1988 CELEBRITY WITH 2.5L (VIN CODE R) ENGINE
TO: ALL CHEVROLET DEALERS
When replacing camshaft timing gears, be aware that if one or more of the cam gear teeth have been damaged or broken off, the force balancer assembly must be replaced. It is NOT NECESSARY to replace the force balancer assembly in cases where the cam gear teeth are simply worn.
Cam gear tooth material can accumulate in the oil passages of the force balancer's counter-rotating shafts, restricting proper lubrication to the bearings of the balancer assembly. This condition may result in premature malfunction of the force balancer and/or engine.
The three components that comprise the force balancer assembly are as follows:
Cover Assembly, Oil Pump P/N 10038405
Housing Assembly, Force Balancer P/N 10101422
GE-Rotor, Oil Pump P/N 10038402
Parts are currently available from GMSPO.
It is recommended that all three components be replaced when a cam gear has failed due to broken or sheared teeth. Refer to Section 6A of the Service Manual for force balancer assembly and removal/installation details.
Labor Operation: T1356
Labor Time: 3.2 Hours
With A/C Add: .3 Hours