Engine - Revised Force Balancer Bolt Tightening

89pontiac06

Bulletin Number: 88-6-49A
Reference Number: 836112
Publish Date: 3/89
SERVICE MANUAL UPDATE - REVISED FORCE
Subject: BALANCER BOLT TIGHTENING PROCEDURE


Models 1987 GRAND AM WITH 2.5L AND MANUAL

Affected: TRANSMISSION AND 1988 GRAND AM, 6000 AND FIERO WITH 2.5L ENGINE (VIN CODES U AND R)

FIGURE 13 - FORCE BALANCER ASSEMBLY:

This bulletin is being revised to add artwork. Please discard bulletin 88-6-49 dated 5/88.

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.

Reference 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).