Installation Procedure

WARNING: This page is about a different variant/trim than selected.

Install the exhaust camshaft position actuator adjuster (2).

Fig 1: Exhaust Camshaft Position Actuator
Courtesy of GENERAL MOTORS COMPANY
Mind the camshaft pin (1), the exhaust camshaft position actuator adjuster does fit in only one position.
Install the exhaust camshaft position actuator adjuster bolt (3) and tighten a first pass to 65 N.m (48 lb ft).
CAUTION: Refer to Fastener Caution .
Tighten the exhaust camshaft position actuator adjuster bolt a final pass to an additional 120 - 135 degrees, using the EN-45059 meter.
CAUTION: Refer to Torque-to-Yield Fastener Caution .
Install the intake camshaft position actuator adjuster (1).

Fig 2: Intake Camshaft Position Actuator
Courtesy of GENERAL MOTORS COMPANY
Mind the camshaft pin (2), the intake camshaft position actuator adjuster does fit in only one position.
Install the intake camshaft position actuator adjuster bolt (3) and tighten a first pass to 65 N.m (48 lb ft).
Tighten the intake camshaft position actuator adjuster bolt a final pass to an additional 120 - 135 degrees, using the EN-45059 meter.
CAUTION: Refer to Torque-to-Yield Fastener Caution .
Install the camshaft timing chain to the camshaft position actuator adjuster.

Fig 3: Camshaft Position Actuator Adjuster Marks
Courtesy of GENERAL MOTORS COMPANY
Ensure that the self-made colored links (1, 2) match to the marks on the camshaft position adjuster actuators.
Install the timing chain tensioner (1).

Fig 4: Timing Chain Tensioner
Courtesy of GENERAL MOTORS COMPANY
Install the 2 timing chain tensioner bolts (2) and tighten to 10 N.m (89 lb in).
Push the timing chain guide - left side (2) in the direction of the arrow.

Fig 5: Timing Chain Guide And Tensioner
Courtesy of GENERAL MOTORS COMPANY
Remove the 2 mm drill bit or equivalent (3) from the tensioner (1).
Loosen the EN-51148 holding tool bolts (2, 3, 4).

Fig 6: Identifying Camshaft Holding Tool Bolts
Courtesy of GENERAL MOTORS COMPANY
Remove the EN-51148 holding tool (1).
Install the upper timing chain guide (1).

Fig 7: Upper Timing Chain Guide
Courtesy of GENERAL MOTORS COMPANY
Install the upper timing chain guide bolts (2) and tighten to 7 N.m (62 lb in).
Check the position of the crankshaft, camshaft and camshaft position actuator adjuster.
Raise the vehicle.
1. Turn crankshaft 720 degrees in the direction of engine rotation by the crankshaft balancer absorber bolt.
2. Adjust the engine to cylinder 1 top death center (TDC) of combustion stroke. Set crankshaft in direction of engine rotation until the markings (2) and (3) line up. Rotate at the crankshaft balancer absorber bolt (1).
  
  Fig 8: Crankshaft Balancer Alignment Marks
  Courtesy of GENERAL MOTORS COMPANY
3. Install the EN-51148 holding tool (1) to camshafts and to the cylinder head.
  
  Fig 9: Identifying Camshaft Holding Tool Bolts
  Courtesy of GENERAL MOTORS COMPANY
  1. Tighten the bolt (3) in the middle.
  2. Tighten the 2 outer bolts (2, 4).
4. If EN-51148 holding tool can be installed, the engine timing is properly adjusted.
5. Remove the middle bolt (3) and the 2 outer bolts (2, 4) and remove the EN-51148 holding tool (1).
Install the upper engine front cover. Refer to Engine Front Cover Replacement - Upper
Install the engine mount bracket. Refer to Engine Mount Bracket Replacement
Front Wheelhouse Liner - Right Side - Remove Front Wheelhouse Liner Replacement
Install the camshaft cover. Refer to Camshaft Cover Replacement