GM 12597414
Camshaft Gear, Passenger Side

To replace the timing chain and sprockets firstly remove the Oil Pump. Rest the timing marks, with the help of the crankshaft socket (J 39946). Then, remove the secondary chains that drive the camshaft, followed by the primary drive chain tensioner and then the oil outlet tube. Retain the timing chain guide and guide bolts, as well as the camshaft intermediate sprocket retaining bolt. Remove the timing chain along with crankshaft sprocket and camshaft intermediate sprocket in an assembly. Clean and inspect the camshaft timing supply components. For installation, ensure that the timer marks of the camshaft intermediate and crankshaft sprockets are aligned vertically. Mount the main timing chain onto the drive sprockets, and with the help of the crankshaft socket (J 39946), rotate the crankshaft until the crankshaft keyway is at the 1 o'clock position. Mount the main timing chain, crankshaft sprocket, and camshaft intermediate sprocket as a set. Install the camshaft intermediate sprocket retaining bolt and tighten it to 60 nm (44 ft. Lbs.). Fit the main drive chain guide and secure with the guide bolts at 25 nm (18 ft. Lbs.). Mount the primary drive chain tensioner, then the oil outlet tube and bolts, tighten oil outlet tube bolts at 10 nm (89 inch lbs.). Lastly, fit the secondary camshaft drive chains on, remove the pin from the timing chain tensioner release lever, make sure that the primary timing marks are aligned vertically, re-fit the Oil Pump.

The replacement process for bank 1 (Right) exhaust Camshaft position actuator starts by taking off upper intaken manifolds then lower intaken manifolds and follows with removal of the Camshaft cover and Camshaft sensors. After removing the intake Camshaft position actuator solenoid make sure to turn the crankshaft balancer clockwise before proceeding. Use the crankshaft balancer bolt to position the crankshaft at neutral until both camshafts align directly with the Camshaft cover rail when measured from their flats. A wrench should be applied to the Camshaft hex to protect it from damage because you should not remove the Camshaft position actuator bolt right now. Install the en 46108 (Timing Chain Retention Tool) while retaining the Timing Chain by ensuring complete engagement of the tool's tips then firmly tighten its nuts. Markposition the chain and corresponding locations on both Camshaft positionactuators before removing the right exhaust Camshaft positionactuator bolt and the actuator assembly. When installing select an ex-marked Camshaft position actuator and position the actuator's timing mark against the highlighted Timing Chain link found on the right engine side. The Camshaft actuator bolt should be loosely hand-tightened while you remove en 46108 then reapply the wrench to the hex of the Camshaft for protection. Secure the intake Camshaft position actuator while also reinstalled the intake Camshaft position actuator solenoid and both Camshaft sensors before putting back the Camshaft cover and upper Intake Manifold to join with the lower Intake Manifold.

Remove the right bank secondary camshaft drive chain, the primary camshaft drive chain tensioner, and the primary camshaft drive chain upper guide.

Start with the primary camshaft timing chain, then install the primary upper camshaft drive chain guide, followed by the primary camshaft drive chain tensioner.

Adjust the camshaft drive sprockets to align the reference marks with the notches.

Install the primary camshaft drive chain tensioner.

Install the right bank secondary camshaft drive chain tensioner (127).

Slide the actuator over the camshaft alignment pin and install it onto the camshaft, then install the right exhaust camshaft position actuator oil control valve.

Install the primary upper camshaft drive chain guide, followed by the primary camshaft drive chain tensioner.

Rotate the crankshaft balancer in a clockwise direction only.

Find the timing alignment mark on the front of the actuator.

Remove the primary camshaft drive chain tensioner, the primary camshaft drive chain upper guide, and the primary camshaft timing chain.