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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) >> Secondary Camshaft Drive Chain Replacement - Left Side >> Installation Procedure

Installation Procedure

WARNING: This page is about a different variant/trim than selected.
    Fig 1: Identifying Secondary Timing Chain Timing Marks
    GM1276766Courtesy of GENERAL MOTORS CORP.
  1. The secondary timing chain (2) has 3 black links that aid in timing the camshaft position actuators to the intermediate sprocket.
  2. The black link (4) is aligned with the bank 2 exhaust actuator timing mark. The black link (3) is aligned with the bank 2 intake actuator timing mark.
  3. The black link (1) is aligned with the intermediate sprocket.
    4. Fig 2: Aligning Sprocket LB Timing Mark To Timing Chain Black Link
    GM1272585Courtesy of GENERAL MOTORS CORP.
  4. The intermediate sprocket left bank timing mark is labeled left bank (LB) as shown.
  5. Assemble the secondary timing chain to the intermediate sprocket aligning the sprocket LB timing mark to the timing chain black link.
    6. Fig 3: Identifying Camshaft Sprockets & Related Components
    GM1276768Courtesy of GENERAL MOTORS CORP.
  6. Align the timing mark (5) of the LB intake camshaft position actuator with the timing chain black link (3) and install the actuator on the camshaft with the actuator timing mark perpendicular (90 degrees) to the cylinder head deck surface at the top of its rotation.
  7. Loosely install the oil control valve (10) to secure the intake actuator.
    8. Fig 4: Holding Camshaft
    GM1275675Courtesy of GENERAL MOTORS CORP.
    NOTE: Refer to Torque Reaction Against Timing Drive Chain Notice .
    NOTE: Refer to Fastener Notice .
  8. Use an open-end wrench on the hex cast into the camshaft in order to prevent the camshaft from rotating when tightening the oil control valve.

    Tighten:  Tighten the oil control valve to 120 N.m (89 lb ft).

    9. Fig 5: Identifying Camshaft Sprockets & Related Components
    GM1276768Courtesy of GENERAL MOTORS CORP.
  9. Align the timing mark (7) of the LB exhaust camshaft position actuator with the timing chain black link (4) and install the actuator on the camshaft with the actuator timing mark perpendicular (90 degrees) to the cylinder head deck surface at the top of its rotation.
  10. Loosely install the oil control valve (8) to secure the exhaust actuator.
    11. Fig 6: Holding Camshaft In Position
    GM1275674Courtesy of GENERAL MOTORS CORP.
    NOTE: Refer to Torque Reaction Against Timing Drive Chain Notice .
  11. Use an open-end wrench on the hex cast into the camshaft in order to prevent the camshaft from rotating when tightening the oil control valve.

    Tighten:  Tighten the oil control valve to 120 N.m (89 lb ft).

    12. Fig 7: View Of Left Secondary Timing Chain Tensioner & Bolts
    GM1276759Courtesy of GENERAL MOTORS CORP.
  12. Install the left secondary timing chain tensioner. Refer to Secondary Camshaft Drive Chain Tensioner Replacement - Left Side .
  13. Install the right secondary timing chain. Refer to Secondary Camshaft Drive Chain Replacement - Right Side .
  14. Remove the EN 46328  .
  15. Install the left camshaft position actuator housing. Refer to Camshaft Position Actuator Housing Replacement - Left Side .
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