Balance Shaft Installation

Special Tools 

EN-43650  Balance Shaft Bushing Remover/Installer

For equivalent regional tools, refer to Special Tools .

Fig 1: Balance Shaft Bushing Remover/Installer Tool
Courtesy of GENERAL MOTORS COMPANY
1. Install the balance shaft bushing using the EN-43650  installer (1).
Fig 2: Seating Balance Shaft Bushing
Courtesy of GENERAL MOTORS COMPANY
2. Seat the balance shaft bushing into the bore using the EN-43650  installer (1) and a wrench.
3. When the EN-43650  installer is fully seated in the engine block, remove it with a wrench.
Fig 3: View of Balance Shaft Bolts
Courtesy of GENERAL MOTORS COMPANY
NOTE:

If the balance shafts are not properly timed to the engine, the engine may vibrate or make noise.

4. Place the number one piston at top dead center (TDC).
5. Lubricate the balance shaft lobes with engine oil.
6. Install the balance shafts (1) into their bores.
CAUTION:

Refer to Fastener Caution .

7. Install the balance shaft retaining bolts and tighten to 10 N.m (89 lb in).