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Home >> GMC >> 2003 >> Safari Van Cargo, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 406 (Engine Mechanical - 3.5L (On-Vehicle)) >> Repair Instructions >> Primary Camshaft Drive Chain Guide Replacement - Left Upper >> 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 primary camshaft drive chain tensioner. Refer to Primary Camshaft Drive Chain Tensioner Replacement .
  2. Transfer the chain slack from the primary camshaft drive chain tensioner area to the primary camshaft drive chain upper guide area by moving the chain links clockwise around the right intake sprocket.
    Fig 1: Locating Chain Links Around Right Intake Sprocket
    G01816827Courtesy of GENERAL MOTORS CORP.

    Important:  Ensure the relationship between the primary camshaft drive chain and balance shaft sprocket remain in a timed sequence.

  3. Rotate the balance shaft counterclockwise in order to transfer the chain slack from the right upper guide to the left upper guide.
    Fig 2: Locating Balance Shaft
    G01816828Courtesy of GENERAL MOTORS CORP.
  4. Remove the chain guide access plug (3) located in the cylinder head. Note the O-ring seal on the access plug.
    Fig 3: Removing Chain Guide Access Plugs
    G01816829Courtesy of GENERAL MOTORS CORP.
  5. Remove the primary camshaft drive chain left upper guide bolts.
  6. Remove the primary camshaft drive chain left upper guide by pulling the guide downward through the front cover area.
    Fig 4: Removing Primary Camshaft Drive Chain Left Upper Guide
    G01816830Courtesy of GENERAL MOTORS CORP.
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