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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 Tensioner Replacement >> Installation Procedure

Installation 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. Collapse the primary camshaft drive chain tensioner using the following procedure:
    1. 1.1. Rotate the ratchet release lever (2) clockwise and hold.
    2. 1.2. Collapse the tensioner shoe (1) and hold.
    3. 1.3. Release the ratchet lever (2).
  2. Slowly release the pressure on the shoe (1), until the ratchet lever (2) moves to the first detent and a "click" is heard and felt.
  3. Collapse the tensioner shoe (1) and hold.
    Fig 1: Collapsing Primary Camshaft Drive Chain Tensioner
    G01819417Courtesy of GENERAL MOTORS CORP.
  4. Insert a pin through the hole in the release lever in order to lock the tensioner shoe in the collapsed position.
    Fig 2: Locking Tensioner Shoe In Collapsed Position
    G01819418Courtesy of GENERAL MOTORS CORP.
    CAUTION: Refer toFASTENER NOTICE .

    Important:  Ensure the tensioner release lever is facing outward.

  5. Install the primary camshaft drive chain tensioner and retaining bolts.

    Tighten 

    Tighten the primary camshaft drive chain tensioner bolts to 25 N.m (18 ft lbs).

  6. Remove the pin holding the tensioner to tighten any slack in the timing chain.
    Fig 3: Installing Primary Camshaft Drive Chain Tensioner
    G01819419Courtesy of GENERAL MOTORS CORP.
  7. Ensure the primary timing marks (1) are aligned vertically.
  8. Install the engine front cover. Refer to Engine Front Cover Replacement .
    Fig 4: Identifying Primary Timing Marks
    G01819420Courtesy of GENERAL MOTORS CORP.
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