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Home >> Chevrolet >> 2001 >> Venture Base, Van Passenger >> Repair and Diagnosis >> External Pages >> Different car >> Section 165 (Engine Mechanical - 4.0L (On-Vehicle)) >> Repair Instructions >> Primary Camshaft Drive Chain and Sprockets Replacement >> Removal Procedure

Removal Procedure

WARNING: This page is about a different car, the 2002 Oldsmobile Aurora. However, it is still accessible from the selected car via links, so may be relevant.
  1. Remove the oil pump. Refer to Oil Pump Replacement .
  2. Align the primary timing marks (1) using the J 39946. 
    3. Fig 1: Identifying Primary Timing Marks
    G01819423Courtesy of GENERAL MOTORS CORP.
  3. Remove the secondary camshaft drive chains. Refer to Secondary Camshaft Drive Chain Replacement - Right  and Secondary Camshaft Drive Chain Replacement - Left  .
  4. Remove the primary drive chain tensioner. Refer to Primary Camshaft Drive Chain Tensioner Replacement .
  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
    Fig 2: Removing Primary Camshaft Drive Chain & Sprockets
    G01819424Courtesy of GENERAL MOTORS CORP.
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