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Home >> Buick >> 2015 >> Verano Premium, Automatic Trans >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 2 (Engine Mechanical - 2.4L (Lea)) >> Repair Instructions - On Vehicle >> Intake Camshaft Replacement >> Removal Procedure

Removal Procedure

WARNING: This page is about a different variant/trim than selected.
  1. Remove the spark plugs. Refer to Spark Plug Replacement .
  2. Remove the upper timing chain guide. Refer to Timing Chain Upper Guide Replacement .
  3. Remove the front wheelhouse liner. Refer to Front Wheelhouse Liner Replacement .
  4. Remove the Fuel Pump. Refer to Fuel Pump Replacement .
    5. Fig 1: Rear Bearing Block & Bolts
    GM2577168Courtesy of GENERAL MOTORS COMPANY
  5. Remove the 3 rear bearing block bolts (1) and remove the rear bearing block (2).
    6. Fig 2: Crankshaft Locking Tool
    GM2557049Courtesy of GENERAL MOTORS COMPANY
  6. Rotate the crankshaft clockwise at the crankshaft balancer bolt and install the EN-48953  locking tool (1) to the camshafts.
    7. CAUTION:

    Refer to Fastener Caution .

  7. Install the EN-48953  locking tool bolts and tighten to 10 N.m (89 lb in).
    8. Fig 3: Camshaft Intake Actuator & Bolt
    GM2557044Courtesy of GENERAL MOTORS COMPANY
  8. Loosen, but DO NOT remove, the camshaft position intake actuator bolt (1).
    9. Fig 4: Camshaft Position Exhaust Actuator & Bolt
    GM2557046Courtesy of GENERAL MOTORS COMPANY
  9. Loosen, but DO NOT remove, the camshaft position exhaust actuator bolt (1) from the exhaust camshaft actuator (2).
  10. Remove the EN-48953  locking tool.
  11. Rotate the crankshaft clockwise at the crankshaft balancer bolt to the TDC of combustion stroke of cylinder 1.
    12. Fig 5: Timing Chain & Camshaft Bearing Cover Marks
    GM2583731Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    Ensure the timing chain and the camshaft position actuators are marked for proper assembly.

  12. Mark both camshaft actuators and their respective locations on the timing chain (1). Mark additional the position from the camshaft actuator to the camshaft bearing cover (2).
  13. Remove the timing chain tensioner. Refer to Timing Chain Tensioner Replacement .
    14. Fig 6: Timing Chain Retention Tool On Intake Side
    GM2557061Courtesy of GENERAL MOTORS COMPANY
  14. Install the EN-48749  retention tool (1) to the intake side of the timing chain.
    15. Fig 7: Timing Chain Retention Tool On Exhaust Side
    GM2557062Courtesy of GENERAL MOTORS COMPANY
  15. Install the EN-48749  retention tool (1) to the exhaust side of the timing chain.
  16. Remove and DISCARD the camshaft position intake actuator bolt (1).
  17. Remove the intake camshaft actuator from the camshaft while also removing the actuator from the timing chain.
  18. Remove and DISCARD the camshaft position exhaust actuator bolt.
  19. Remove the exhaust camshaft actuator from the camshaft while also removing the actuator from the timing chain.
  20. Mark the bearing caps to ensure they are installed in the original position.
    21. Fig 8: Intake Camshaft, Bearing Cap & Bolts
    GM2557060Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    Remove each bolt on each cap one turn at a time until there is no spring tension pushing on the camshaft.

  21. Remove the 10 bearing cap bolts (1).
  22. Remove the 5 bearing caps (2).
  23. Remove the intake camshaft (3).
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