Removal Procedure

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

Fig 1: View Of Right Secondary Timing Chain Tensioner & Bolts

Courtesy of GENERAL MOTORS CORP.

Remove the right secondary camshaft tensioner. Refer to Secondary Camshaft Drive Chain Tensioner Replacement - Right Side .

Fig 2: View Of Right Camshaft Position Actuator Housing

Courtesy of GENERAL MOTORS CORP.

Remove the right camshaft position actuator housing. DO NOT remove the camshaft actuator solenoids from the housing. Refer to Camshaft Position Actuator Housing Replacement - Right Side .

Fig 3: Identifying Camshaft Sprockets & Related Components

Courtesy of GENERAL MOTORS CORP.

Using the J 39946 , rotate the crankshaft until both camshaft position actuator timing marks (3, 5) are at the top of their rotation.

Fig 4: Identifying EN 46328 Cam Tool

Courtesy of GENERAL MOTORS CORP.

CAUTION: Refer to Camshaft Holding Tool Caution .

Install the EN 46328 (1) to the camshafts (2).

Fig 5: Using A Paint Stick To Create A Mark On The Timing Chain Link Adjacent To Each Camshaft Sprocket Timing Mark

Courtesy of GENERAL MOTORS CORP.

IMPORTANT: The secondary timing chain has black links that are used for alignment when the primary and secondary timing gear and chain assemblies are being installed together. IT IS NOT NECESSARY for the black chain links to be aligned with the camshaft actuator timing marks when the secondary chain and gear components are being serviced separately.

Use a paint stick to create a mark (1) on the timing chain link adjacent to each camshaft position actuator timing mark (2, 3).
Use a paint stick to create a mark on a primary chain link and intermediate primary chain sprocket tooth adjacent to the primary chain link.

Fig 6: Holding Camshaft In Position

Courtesy of GENERAL MOTORS CORP.

NOTE: Refer to Torque Reaction Against Timing Drive Chain Notice .

Use an open end wrench on the hex cast into the right intake camshaft to prevent the camshaft from rotating when loosening the camshaft oil control valve.

Fig 7: View Of Camshaft Oil Control Valve

Courtesy of GENERAL MOTORS CORP.

Loosen and remove the right intake oil control valve.
Slide the right intake camshaft actuator off of the camshaft, disengage the sprocket teeth from the secondary timing chain, and remove the actuator.

Fig 8: View Of Right Secondary Camshaft Drive Chain Guide

Courtesy of GENERAL MOTORS CORP.

Remove the secondary camshaft drive chain guide bolt.
Remove the right secondary camshaft drive chain guide.
Clean and inspect the camshaft timing drive components. Refer to Camshaft Timing Drive Components Cleaning and Inspection .