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Home >> Buick >> 2008 >> Allure CXL >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 2 (Engine Mechanical - 3.6L (2 Of 5)) >> On-Vehicle Repair Information (1 Of 2) >> Camshaft Replacement - Left Side >> Removal Procedure

Removal Procedure

WARNING: This page is about a different variant/trim than selected.
  1. Remove the upper intake manifold with the lower intake manifold. Refer to Lower Intake Manifold Replacement .
  2. Remove the left bank camshaft cover. Refer to Camshaft Cover Replacement - Left Side .
  3. Remove the camshaft sensors. Refer to Camshaft Position Sensor Replacement - Bank 2 (Left Side) Exhaust and Camshaft Position Sensor Replacement - Bank 2 (Left Side) Intake .
  4. Remove the camshaft position actuator solenoid. Refer to Camshaft Position Actuator Solenoid Valve Solenoid Replacement - Bank 2 (Left Side) Intake .
    5. Fig 1: Rotating Camshaft Flats Parallel With Camshaft Cover Rail
    GM1306293Courtesy of GENERAL MOTORS CORP.
    IMPORTANT: Rotate the crankshaft balancer in a clockwise rotation ONLY.
  5. Rotate the crankshaft using the crankshaft balancer bolt until the camshafts are in a neutral (low tension) position. The camshaft flats will be parallel with the camshaft cover rail (1).
    6. Fig 2: Preventing Camshaft/Engine Rotation Using Open-End Wrench
    GM1340931Courtesy of GENERAL MOTORS CORP.
    NOTE: Refer to Torque Reaction Against Timing Drive Chain Notice .
    IMPORTANT:
    • Use an open-end wrench at the camshaft hex to prevent camshaft/engine rotation.
    • DO NOT remove the camshaft position actuator bolt at this time.
  6. Loosen the camshaft position actuator bolt.
    7. Fig 3: Inserting Timing Chain Rentention Tool
    GM1858601Courtesy of GENERAL MOTORS CORP.
  7. Unscrew the EN-48313  so that the legs of the tool are retracted. See Special Tools .
  8. Insert the EN-48313  between the camshaft actuators, rearward of the timing chain until the bottom line that is scribed in the body of the tool (2) is adjacent to the top surface of the cylinder head (1). See Special Tools . This is the approximate installed position.
    9. Fig 4: View Of Feet, Legs & Timing Chain Guide
    GM1858602Courtesy of GENERAL MOTORS CORP.
    IMPORTANT: The engine front cover is removed for clarity in the following graphics, but NOT required to perform the procedure.
  9. Ensure that the feet (4) on the legs of the tool are facing the front of the engine.
  10. Partially expand the legs (1, 3) of the EN-48313  by turning the T-shaped handle clockwise. See Special Tools .
  11. Insert the leg of the tool (1) behind the timing chain guide (2).
  12. Continue expanding the EN-48313  until the legs (1, 3) contact the timing chain. See Special Tools . Do not tighten at this time.
    13. Fig 5: Identifying Foot Of Special Tool EN-48313
    GM1858603Courtesy of GENERAL MOTORS CORP.
    IMPORTANT: Ensure that the foot (1) of the EN-48313  is engaged into one of the link pockets to prevent tool slippage during tightening of the EN-48313  . See Special Tools .
  13. Hand tighten the EN-48313  . See Special Tools .
    14. NOTE: Refer to Torque Reaction Against Timing Drive Chain Notice .
  14. Use an open end wrench on the hex cast into the left intake and exhaust camshafts and rotate the camshafts toward each other in order to create slack in the chain between the actuators.
    15. Fig 6: Identifying Special Tool - EN-48313
    GM1858605Courtesy of GENERAL MOTORS CORP.
  15. The EN-48313  is now properly installed to hold the timing chain in position. See Special Tools .
    16. Fig 7: Locating Left Secondary Camshaft Drive Chain Timing Marks
    GM1306391Courtesy of GENERAL MOTORS CORP.
    IMPORTANT: Ensure that the camshaft timing chain and the camshaft position actuators are marked for proper assembly.
  16. Mark the timing chain and the respective locations on the camshaft position actuators (1-4).
  17. Remove the camshaft position actuator bolt.
  18. Remove the camshafts. Refer to Camshaft Removal - Left Side .
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