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Home >> Buick >> 2002 >> Century Limited >> Repair and Diagnosis >> Engine Mechanical >> Mechanical >> Engine Mechanical - 3.1L V6 - VIN (J) (On-Vehicle) >> Repair Instructions >> Timing Chain and Sprockets Replacement >> Removal Procedure

Removal Procedure

  1. Remove the engine front cover. Refer to Engine Front Cover Replacement .
  2. Rotate the crankshaft until the timing marks in the following locations are aligned:
    • The timing chain dampener to the crankshaft sprocket (2).
    • The timing chain dampener to the camshaft sprocket locator hole (1).
      • Fig 1: Aligning Timing Marks
      G01763637Courtesy of GENERAL MOTORS CORP.
  3. Remove the camshaft sprocket bolt.
    Fig 2: Camshaft Sprocket Bolt
    G01763638Courtesy of GENERAL MOTORS CORP.
  4. Remove the camshaft sprocket with the timing chain.
    Fig 3: Camshaft Sprocket With The Timing Chain
    G01763639Courtesy of GENERAL MOTORS CORP.
  5. Use the J 5825-A in order to remove the crankshaft sprocket.
    Fig 4: Crankshaft Sprocket
    G01763640Courtesy of GENERAL MOTORS CORP.
  6. Remove the timing chain dampener bolts.
  7. Remove the timing chain dampener.
    Fig 5: Timing Chain Dampener And Bolts
    G01763641Courtesy of GENERAL MOTORS CORP.
  8. If necessary remove the camshaft thrust plate bolts.
  9. Remove the camshaft thrust plate.
    Fig 6: Camshaft Thrust Plate And Bolts
    G01763642Courtesy of GENERAL MOTORS CORP.
  10. Clean and inspect the timing chain and gears. Refer to TIMING CHAIN AND SPROCKETS CLEANING AND INSPECTION .
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