Engine - Revised Force Balancer Bolt Torque
88buick09Bulletin: 88-6-21
Date: July, '88
Ref. No.: 88-175-6
Corp. Ref. No.: 836112R
SUBJECT: SERVICE MANUAL UPDATE - REVISED FORCE BALANCER BOLT TIGHTENING PROCEDURE
MODELS AFFECTED: 1987 SOMERSETS/SKYLARKS WITH 2.5L ENGINE (VIN CODE U) AND MANUAL TRANSMISSION 1988 SKYLARKS WITH 2.5L ENGINES (VIN CODE U) 1988 CENTURYS WITH 2.5L ENGINES (VIN CODE R)
SERVICE MANUAL UPDATE
A revised bolt tightening procedure has been developed to provide a more uniform clamp load on the balancer assembly.
The following procedure supersedes the existing service procedure.
Referring to the figure:
1. Snug bolts to 12 N-m (9 ft.lbs.) in the following sequence - 3-1-2-4.
2. Following the same sequence, tighten the short bolts to 20 N-m (15 ft.lbs.) plus 60 degrees (one flat of the bolt head) and the long bolts to 15 N-m (11 ft.lbs.) plus 90 degrees (one and a half flats).