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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 257 (Engine Mechanical - 4.0L (On-Vehicle)) >> Repair Instructions >> Secondary Camshaft Drive Chain Tensioner Replacement - Left >> 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 engine front cover. Refer to Engine Front Cover Replacement .

    Important:  Aligning the primary timing marks will locate the left camshafts in a neutral position, preventing them from rotating when the tensioner is removed.

  2. Align the primary timing marks (1) using the J 39946. 
    Fig 1: Identifying Primary Timing Marks
    G01819346Courtesy of GENERAL MOTORS CORP.
  3. Remove the two bolts attaching the left secondary camshaft drive chain tensioner to the engine block.
  4. Remove the left secondary camshaft drive chain tensioner, allowing the tensioner to expand as you remove it.
    Fig 2: Removing Left Secondary Camshaft Drive Chain Tensioner
    G01819347Courtesy of GENERAL MOTORS CORP.
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