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Home >> GMC >> 2003 >> Safari Van Cargo, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 257 (Engine Mechanical - 4.0L (On-Vehicle)) >> Repair Instructions >> Secondary Camshaft Drive Chain Tensioner Replacement - Right >> 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 right secondary camshaft chain tensioner using the following procedure:
    1. 1.1. Rotate the ratchet release lever (2) counterclockwise 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 Right Secondary Camshaft Chain Tensioner
    G01819354Courtesy 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
    G01819355Courtesy of GENERAL MOTORS CORP.
    CAUTION: Refer toFASTENER NOTICE .

    Important:  Ensure the tensioner release lever is facing outward.

  5. Install the right secondary camshaft drive chain tensioner and retaining bolts.

    Tighten 

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

  6. Fig 3: Installing Right Secondary Camshaft Drive Chain Tensioner
    G01819356Courtesy of GENERAL MOTORS CORP.
  7. Remove the pin holding the tensioner to tighten any slack in the timing chain.
  8. Remove the mechanics wire (1) supporting the right secondary camshaft drive chain shoe (3).
  9. Remove the engine front cover bolt (2) from the front of the engine.
  10. Fig 4: Removing Mechanics Wire Around Right Secondary Camshaft Drive Chain Shoe & Front Cover Bolt
    G01819357Courtesy of GENERAL MOTORS CORP.
  11. Install the engine front cover. Refer to Engine Front Cover Replacement .