Crankshaft Balancer Installation

Tools Required

• J 42845  Crankshaft Balancer Installer. See Special Tools .
• J 42847  Flywheel Holding Tool. See Special Tools .

Fig 1: View Of J 42847 & Bolts
Courtesy of GENERAL MOTORS CORP.
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  (1) to the starter bolt holes. See Special Tools .

   Tighten:  Tighten the J 42847  bolts to 50 N. See Special Tools .m (37 lb ft).

Fig 2: View Of Crankshaft Balancer
Courtesy of GENERAL MOTORS CORP.
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 3: Installing Crankshaft Balancer Using J 42845
Courtesy of GENERAL MOTORS CORP.
IMPORTANT: Apply the lubricant that comes with J 42845  each time the tool is used. See Special Tools . Failure to lubricate J 42845  may prevent the balancer from installing completely. See Special Tools .
3. Use the J 42845  (1) in order to install the balancer. See Special Tools .
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. See Special Tools .
Fig 4: View Of J 42845
Courtesy of GENERAL MOTORS CORP.
5. Remove the J 42845  from the crankshaft. See Special Tools .
Fig 5: View Of Crankshaft Balancer Bolt & Washer
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).

Fig 6: View Of J 42847 & Bolts
Courtesy of GENERAL MOTORS CORP.
7. Remove the J 42847  (1). See Special Tools .