Crankshaft Balancer Installation

Tools Required 

• J 42845  Crankshaft Balancer Installer
• J 42847  Flywheel Holding Tool
  NOTE: Refer to FASTENER NOTICE in Cautions and Notices.

Important: 

• Ensure that the teeth of the flywheel holding tool engage the engine flywheel teeth.
• The balancer should be positioned onto the end of the crankshaft as straight as possible prior to tool installation.

1. Install the J 42847  to the starter bolt holes.

   Tighten 

   Tighten the J 42847  bolts to 50 N.m (37 lb ft).

   Important:  Apply grease or clean engine oil to the inside of the crankshaft balancer or the end of the crankshaft, to prevent galling during assembly.

2. Install the balancer onto the end of the crankshaft.
   Fig 1: Crankshaft Balancer & Bolt

   Courtesy of GENERAL MOTORS CORP.

   Important:  Apply the lubricant that comes with J 42845 each time the tool is used. Failure to lubricate J 42845 may prevent the balancer from installing completely.

3. Use the J 42845  in order to install the balancer.
   NOTE: Ensure the crankshaft balancer is installed to the proper depth. The crankshaft balancer nose must be seated against the crankshaft sprocket. Failure to install the crankshaft balancer properly may result in improper torque to the crankshaft balancer bolt. An improperly torqued crankshaft balancer bolt may loosen causing serious engine damage.
4. Tighten the J 42845  until the crankshaft balancer is completely seated against the crankshaft sprocket.
   Fig 2: Installing Crankshaft Balancer Using J 42845

   Courtesy of GENERAL MOTORS CORP.
5. Remove the J 42845  from the crankshaft.
   Fig 3: Removing J 42845 From Crankshaft

   Courtesy of GENERAL MOTORS CORP.
6. Install the crankshaft balancer washer and bolt.

   Tighten 

   Tighten the crankshaft balancer bolt to 255 N.m (189 lb ft).

7. Remove the J 42847. 
   Fig 4: Crankshaft Balancer & Bolt

   Courtesy of GENERAL MOTORS CORP.