Crankshaft Balancer Installation

Special Tools

• EN-48585  Crankshaft Balancer Guide
• EN-48953  Camshaft Actuator Locking Tool
• EN 38122-A  Crankshaft Balancer Holder
• EN 43653  Flywheel Holding Tool
• EN 45059  Angle Meter

For equivalent regional tools, refer to Special Tools .

Fig 1: Identifying Balancer
Courtesy of GENERAL MOTORS COMPANY
CAUTION:

Ensure both components are aligned correctly or serious engine damage will occur.

1. Install the EN 38122-A  holder into the end of the crankshaft.
2. Install the balancer (1) onto the EN-48585  guide. Use care to properly align the keyway and flats on the balancer with the oil pump drive.
Fig 2: Crankshaft Balancer Holder
Courtesy of GENERAL MOTORS COMPANY
NOTE:

EN 43653  locking tool may be used instead of EN 38122-A  holder to prevent crankshaft rotation.

3. Install the EN 38122-A  holder (1).
CAUTION:

Refer to Fastener Caution .

NOTE:

Always install a new crankshaft balancer retaining bolt and washer.

4. Install a new retaining bolt and washer. Use the EN 38122-A  holder and a breaker bar to prevent the crankshaft from rotating when tightening the bolt. Tighten the bolt to 150 N.m (111 lb ft) plus 100 degrees using the EN 45059  meter.
Fig 3: View Locking Tool
Courtesy of GENERAL MOTORS COMPANY
5. Install the EN-48953  locking tool (1) and tighten the bolts into the cylinder head. Tighten the EN-48953  locking tool retaining bolts to 10 N.m (89 lb in).
6. Release the timing chain tensioner by applying 45 N.m (33 lb ft) counterclockwise torque to the crankshaft balancer bolt.
7. Remove the EN-48953  locking tool.