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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 Position Actuator Replacement - Bank 2 (Left Side) Exhaust (Fourth Design) >> Removal Procedure

Removal Procedure

WARNING: This page is about a different variant/trim than selected.
    Fig 1: Rotating Camshaft Flats Parallel With Camshaft Cover Rail
    GM1306293Courtesy of GENERAL MOTORS CORP.
  1. Remove the lower intake manifold with the upper manifold. Refer to Lower Intake Manifold Replacement .
  2. Remove the left camshaft cover. Refer to Camshaft Cover Replacement - Left Side .
  3. Remove the left intake and exhaust camshaft position sensors. Refer to Camshaft Position Sensor Replacement - Bank 2 (Left Side) Intake and Camshaft Position Sensor Replacement - Bank 2 (Left Side) Exhaust .
  4. Remove the left intake and exhaust camshaft position actuator solenoid. Refer to Camshaft Position Actuator Solenoid Valve Solenoid Replacement - Bank 2 (Left Side) Intake and Camshaft Position Actuator Solenoid Valve Solenoid Replacement - Bank 2 (Left Side) Exhaust .
    5. IMPORTANT: Rotate the crankshaft balancer bolt in a clockwise direction ONLY.
  5. Rotate the crankshaft balancer using the balancer bolt until the camshafts are in a neutral (low tension) position. The camshafts will be parallel with the camshaft cover rail (1).
    6. Fig 2: 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.
  6. Use a paint stick to create an alignment mark on one of the timing chain links (2) and the adjacent tooth on the exhaust camshaft position actuator (1).
  7. Use a paint stick to create an alignment mark on one of the timing chain links (3) and the adjacent tooth on the intake camshaft position actuator (4).
    8. NOTE: Refer to Torque Reaction Against Timing Drive Chain Notice .
  8. 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.
    9. Fig 3: Inserting Timing Chain Rentention Tool
    GM1858601Courtesy of GENERAL MOTORS CORP.
  9. Unscrew the EN-48313  so that the legs of the tool are retracted. See Special Tools .
  10. 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.
    11. 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.
  11. Ensure that the feet (4) on the legs of the tool are facing the front of the engine.
  12. Partially expand the legs (1, 3) of the EN-48313  by turning the T-shaped handle clockwise. See Special Tools .
  13. Insert the leg of the tool (1) behind the timing chain guide (2).
  14. Continue expanding the EN-48313  until the legs (1, 3) contact the timing chain. See Special Tools . Do not tighten at this time.
    15. 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 .
  15. Hand tighten the EN-48313  . See Special Tools .
    16. NOTE: Refer to Torque Reaction Against Timing Drive Chain Notice .
  16. 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.
    17. Fig 6: Identifying Special Tool - EN-48313
    GM1858605Courtesy of GENERAL MOTORS CORP.
  17. The EN-48313  is now properly installed to hold the timing chain in position. See Special Tools .
    18. Fig 7: View Of Exhaust Camshaft Position Actuator Bolt
    GM1858699Courtesy of GENERAL MOTORS CORP.
    NOTE: Refer to Torque Reaction Against Timing Drive Chain Notice .
  18. Use an open end wrench on the hex cast into the camshaft in order to prevent engine rotation when loosening the camshaft position actuator bolt.
  19. Remove the left exhaust camshaft position actuator bolt.
  20. Remove the left exhaust camshaft position actuator. When removing the actuator, place the chain on the engine block side of the actuators.
  21. Rotate the actuator in order to align the opening in the actuator reluctor wheel with the cam sensor boss in the front cover, to allow actuator removal.
  22. If removing both the exhaust and intake camshaft actuators, the timing chain can be draped over the EN-48313  once the actuators have been removed. See Special Tools .
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