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Home >> Buick >> 2007 >> Lucerne CX >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 10 (Engine Mechanical - 4.6L (2 Of 5)) >> On-Vehicle Repair Instructions (1 Of 2) >> Primary Camshaft Drive Chain and Sprockets Replacement >> Removal Procedure

Removal Procedure

WARNING: This page is about a different variant/trim than selected.
  1. Remove the oil pump. Refer to Oil Pump Replacement .
    2. Fig 1: Identifying Primary Timing Gear Alignment Marks
    GM517185Courtesy of GENERAL MOTORS CORP.
  2. Align the primary timing marks (1) using the J 39946  .
  3. Remove the secondary camshaft drive chains. Refer to Secondary Camshaft Drive Chain Replacement - Right Side  and Secondary Camshaft Drive Chain Replacement - Left Side .
  4. Remove the primary drive chain tensioner. Refer to Primary Camshaft Drive Chain Tensioner Replacement .
    5. Fig 2: Identifying Camshaft Intermediate Sprocket Retaining Bolt & Camshaft Drive Chain
    GM534270Courtesy of GENERAL MOTORS CORP.
  5. Remove the camshaft intermediate sprocket retaining bolt (3).
  6. Remove the following as an assembly:
    • The primary camshaft drive chain (4)
    • The crankshaft sprocket
    • The camshaft intermediate sprocket
  7. Clean and inspect the camshaft timing drive components. Refer to Camshaft Timing Drive Components Cleaning and Inspection .
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