Balance Shaft Removal

Special Tools 

EN-43650  Balancer Shaft Bearing Remover and Installer

For equivalent regional tools, refer to Special Tools .

Fig 1: View of Balance Shaft Bolts
Courtesy of GENERAL MOTORS COMPANY
1. Remove the balance shaft bearing carrier bolts.
NOTE:
• It is possible to install the intake side balance shaft into the exhaust side and vice versa. Please use care not to install the balance shafts into the wrong bores. Engine vibration will result.
• Do not remove the bolt holding the sprocket.
2. Remove the balance shaft assemblies (1).
Fig 2: Balance Shaft Bushing Remover
Courtesy of GENERAL MOTORS COMPANY
CAUTION:

Proper centering of the tool is required on the balance shaft bushing. If the tool is not properly centered then damage to the bearing bore and block will occur.

3. Install the EN-43650  remover (1) into the balance shaft hole. Insert the tool with the foot parallel to the shaft.
Fig 3: Aligning Balance Shaft Bushing Remover
Courtesy of GENERAL MOTORS COMPANY
4. When the EN-43650  remover (1) is inserted in the block, turn the EN-43650  remover so that the foot becomes perpendicular to the shaft.
5. Center the foot of the EN-43650  remover on the balance shaft bushing.
6. Once the EN-43650  remover is centered on the balance shaft bushing, insert the centering guide into the front balance shaft bore and tighten the nut with an appropriate wrench (2).

   When the EN-43650  remover is properly installed for removal of the bushing, the end of the tool should be 116 mm (4.6 in) (a) from the block face.

   If the EN-43650  remover is less than approximately 114 mm (4.5 in) (a) from the block face, recheck the tool alignment.

Fig 4: Removing Balance Shaft Bushing
Courtesy of GENERAL MOTORS COMPANY
7. Tighten the nut on the EN-43650  remover (1) until the tension releases. When the tension releases, remove the EN-43650  remover and the balance shaft bushing (2).