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Installation Procedure

WARNING: This page is about a different variant/trim than selected.
    Fig 1: Identifying Balancer
    GM2148366Courtesy of GENERAL MOTORS CORP.
    CAUTION: Ensure both components are aligned correctly or serious engine damage will occur.
  1. Install the J 38112-A:  holder into the end of the crankshaft.
  2. Install the balancer (1) onto the EN-48585:  guide. Use care to properly align the keyway and flats on the balancer with the oil pump drive.
    3. Fig 2: Identifying Special Tool J 38122-A
    GM2148293Courtesy of GENERAL MOTORS CORP.
    NOTE: J 43653:  locking tool may be used instead of J 38112-A:  holder to prevent crankshaft rotation.
  3. Install the J 38122-A:  holder (1).
    4. CAUTION: Refer to Fastener Caution .
    NOTE: Always install a new crankshaft balancer retaining bolt and washer.
  4. Install a new retaining bolt and washer. Use the J 38122-A:  holder and a breaker bar to prevent the crankshaft from rotating when tightening the bolt. Tighten the bolt to 100 N.m (74 lb ft) plus 125 degrees using the J 45059:  meter.
    5. Fig 3: Camshaft Actuator Locking Tool
    GM2128100Courtesy of GENERAL MOTORS CORP.
  5. Install the EN-48953:  locking tool (1) and tighten the bolts into the cylinder head. Tighten the EN-48953:  locking tool retaining bolts to 10 N.m (89 lb in).
  6. Release the timing chain tensioner by applying 45 N.m (33 lb ft) counterclockwise torque to the crankshaft balancer bolt.
  7. Remove the EN-48953:  locking tool.
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