Installation Procedure

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

Install the camshaft position actuator adjuster (3).

Fig 1: Camshaft Position Actuator Adjuster Closure Bolt
Courtesy of GENERAL MOTORS COMPANY

NOTE: Do not tighten the camshaft adjuster bolts.
Install NEW camshaft position actuator adjuster bolts (2).
Tighten the camshaft position actuator adjuster bolts (2) in three passes:
CAUTION: Refer to Fastener Caution .

CAUTION: Refer to Torque-to-Yield Fastener Caution .

NOTE: A second technician is required.

Hold at the appropriate camshaft hexagon.
1. First pass tighten to 65 N.m (48 lb ft).
2. Second pass to 120°.
3. Third pass to 15°.
Replace the camshaft position actuator adjuster seal rings.
Install the 2 camshaft position actuator adjuster closure plugs (1) and tighten to 30 N.m (22 lb ft).
Remove the EN-6628-A locking tool.
Clean the timing belt tensioner thread.

Fig 2: Timing Belt Tensioner
Courtesy of GENERAL MOTORS COMPANY
Install the timing belt tensioner (2) and tighten the NEW timing belt tensioner bolt (1) to 20 N.m (15 lb ft).
Clean the timing belt idler pulley thread.
Install the timing belt idler pulley (2) and tighten the NEW bolt (1) to 25 N.m (18 lb ft).

Fig 3: Timing Belt Idler Pulley Bolt
Courtesy of GENERAL MOTORS COMPANY
Turn the crankshaft in the direction of engine rotation, by the crankshaft balancer bolt, to cylinder 1 TDC of combustion stroke.

Fig 4: Aligning Timing Belt Drive Gear And Oil Pump Housing
Courtesy of GENERAL MOTORS COMPANY

NOTE: The timing belt drive gear and oil pump housing must align.
Install the EN-652 flywheel holder (1), lock the flywheel (2) (or automatic transmission flex respectively) via the starter ring gear.

Fig 5: Flywheel And Flywheel Holder
Courtesy of GENERAL MOTORS COMPANY
Insert the timing belt (1).

Fig 6: Timing Belt, Timing Belt Tensioner
Courtesy of GENERAL MOTORS COMPANY

NOTE: Observe direction of rotation.
Apply preliminary tension clockwise to the timing belt tension roller.
Remove the EN-6333 locking pin.
Release the tension on the timing belt tensioner.
Install the lower front timing belt cover (1) and tighten the 4 bolts (2) to 6 N.m (53 lb in).

Fig 7: Timing Belt Lower Front Cover
Courtesy of GENERAL MOTORS COMPANY
Install the crankshaft balancer (2) and NEW bolt (1) and tighten in 3 passes using the EN-45059 sensor kit:

Fig 8: Crankshaft Balancer And Bolt
Courtesy of GENERAL MOTORS COMPANY
1. First pass to 95 N.m (70 lb ft).
2. Second pass to 45°.
3. Third pass to 15°.
Remove the EN-652 flywheel holder to unlock the crankshaft.
Remove the EN-6340 locking tool.
Check position of the camshaft position actuator adjuster.
1. Turn crankshaft 720° in the direction of engine rotation by the crankshaft balancer bolt.
2. Insert EN-6340 locking tool into camshaft timing gears.
  NOTE: Note marking, camshaft position actuator adjuster.
Insert the EN-6628-A locking tool (1) into the camshafts.

Fig 9: Locking Tool
Courtesy of GENERAL MOTORS COMPANY
Align camshafts by hexagon until EN-6628-A locking tool can be inserted in both camshafts.
Check the crankshaft position.

Fig 10: View Of Crankshaft TDC Position
Courtesy of GENERAL MOTORS COMPANY
Marking on crankshaft balancer must align with marking on timing belt lower cover, see mark (1).
Remove the EN-6628-A locking tool.
Install the camshaft cover. Refer to Camshaft Cover Installation .
Install the timing belt upper front cover. Refer to Timing Belt Upper Front Cover Installation .