Tools Required

J 43650  Balancer Shaft Bearing Remover and Installer. See Special Tools .

Fig 1: View Of Balance Shafts assemblies
Courtesy of GENERAL MOTORS CORP.
1. Remove the balance shaft bearing carrier bolts.
IMPORTANT:
• 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.
Fig 2: Identifying J 43650
Courtesy of GENERAL MOTORS CORP.
NOTE: 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 J 43650  into the balance shaft hole. See Special Tools . Insert the tool with the foot parallel to the shaft.
Fig 3: Using J 43650
Courtesy of GENERAL MOTORS CORP.
4. When the J 43650  is inserted in the block turn the J 43650  so that the foot becomes perpendicular to the shaft. See Special Tools .
5. Center the foot of the J 43650  on the balance shaft bushing. See Special Tools .
6. Once the J 43650  is centered on the balance shaft bushing, then insert the centering guide into the front balance shaft bore and tighten the nut with an appropriate wrench. See Special Tools .

   When the J 43650  is properly installed, before removing the bushing, the end of the tool should be 116 mm (4. See Special Tools .6 in) (a) from the block face.

   If the J 43650  is less than approximately 114 mm (4. See Special Tools .5 in) (a), recheck the tool alignment.

Fig 4: Using J 43650 To Remove Balance Shaft Bushing
Courtesy of GENERAL MOTORS CORP.
7. Tighten the nut on the J 43650  until the tension releases. See Special Tools . When the tension releases, remove the J 43650  and the balance shaft bushing. See Special Tools .