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Home >> Cadillac >> 2006 >> STS Base, 3.6 7, RWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 4 (Engine Mechanical - 4.6L (LH2) - 1 Of 5) >> On-Vehicle Repair Instructions (Part 1) >> Primary Camshaft Drive Chain Tensioner Replacement >> Installation Procedure

Installation Procedure

WARNING: This page is about a different variant/trim than selected.
    Fig 1: View Of Primary Camshaft Drive Chain Tensioner Shoe & Ratchet Lever
    GM240843Courtesy of GENERAL MOTORS CORP.
  1. Collapse the primary camshaft drive chain tensioner using the following procedure:
    1. Rotate the ratchet release lever (2) clockwise and hold.
    2. Collapse the tensioner shoe (1) and hold.
    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.
    4. Fig 2: Locking Primary Camshaft Drive Chain Tensioner Shoe Into Collapsed Position
    GM52989Courtesy 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.
    5. Fig 3: View Of Primary Camshaft Drive Chain Tensioner
    GM928392Courtesy of GENERAL MOTORS CORP.
    NOTE: Refer to Fastener 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 lb ft).

  6. Remove the pin holding the tensioner to tighten any slack in the timing chain.
    7. Fig 4: Identifying Primary Timing Gear Alignment Marks
    GM517185Courtesy of GENERAL MOTORS CORP.
  7. Ensure the primary timing marks (1) are aligned vertically.
  8. Install the engine oil pump. Refer to Oil Pump Replacement .
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