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Installation Procedure

WARNING: This page is about a different variant/trim than selected.
    Fig 1: Exhaust Camshaft, Bearing Caps & Bolts
    GM2557063Courtesy of GENERAL MOTORS COMPANY
  1. Install the exhaust camshaft (3).
  2. Install the 5 bearing caps (2).
  3. Install the 10 bearing cap bolts (1) hand tighten.
    4. CAUTION:

    Refer to Fastener Caution .

  4. Tighten the bearing cap bolts in increments of 3 turns until they are seated.
  5. When all the bearing caps are seated, tighten the bolts to 10 N.m (89 lb in).
    6. Fig 2: Camshaft Position Exhaust Actuator & Bolt
    GM2557046Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    Ensure the timing chain and the camshaft position actuators are on their marked points.

    Ensure that the exhaust camshaft actuator fully fits in the exhaust camshaft.

  6. Install the exhaust camshaft actuator (2) to the camshaft while also installing the actuator at the timing chain.
    7. Fig 3: Camshaft Intake Actuator & Bolt
    GM2557044Courtesy of GENERAL MOTORS COMPANY
  7. Install the intake camshaft actuator (2) to the camshaft while also installing the actuator at the timing chain.
    8. Fig 4: Open Ended Wrench & Actuator Bolt
    GM2557103Courtesy of GENERAL MOTORS COMPANY
  8. Rotate the exhaust camshaft with a open ended wrench (1) to install the camshaft exhaust actuator on the marked points.
  9. Install the NEW camshaft position exhaust actuator bolt handtighten.
  10. Rotate the intake camshaft with a open ended wrench (1) to install the camshaft intake actuator on the marked points.
  11. Install the NEW camshaft position intake actuator bolt handtighten.
  12. Remove both EN-48749  retention tool from the timing chain.
  13. Reset and install the timing chain tensioner. Refer to Timing Chain Tensioner Replacement .
    14. Fig 5: Crankshaft Locking Tool
    GM2557049Courtesy of GENERAL MOTORS COMPANY
  14. Rotate the crankshaft clockwise at the crankshaft balancer bolt and install the EN-48953  locking tool (1) to the camshafts.
  15. Install the EN-48953  locking tool bolts and tighten to 10 N.m (89 lb in).
    16. CAUTION:

    Refer to Torque-to-Yield Fastener Caution .

  16. Tighten the NEW exhaust camshaft actuator bolt a first pass to 30 N.m (22 lb ft).
  17. Tighten the exhaust camshaft actuator bolt a final pass to an additional 100 degrees, using the EN-45059  meter.
    18. CAUTION:

    Refer to Torque-to-Yield Fastener Caution .

  18. Tighten the NEW intake camshaft actuator bolt a first pass to 30 N.m (22 lb ft).
  19. Tighten the intake camshaft actuator bolt a final pass to an additional 100 degrees, using the EN-45059  meter.
  20. Remove the EN-48953  locking tool.
  21. Rotate the crankshaft clockwise at the crankshaft balancer bolt to 720 degrees and ensure that the marks are still fit. If the marks are not fit, refer to Camshaft Timing Chain, Sprocket, and Tensioner Replacement .
  22. Install the front wheelhouse liner. Refer to Front Wheelhouse Liner Replacement .
  23. Install the upper timing chain guide. Refer to Timing Chain Upper Guide Replacement .
  24. Install the spark plugs. Refer to Spark Plug Replacement .
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