Removal Procedure

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

Fig 1: Identifying Primary Timing Gear Alignment Marks

Courtesy of GENERAL MOTORS CORP.

Using the J 39946 , rotate the crankshaft until the primary timing gear marks (1) are adjacent to each other as shown. See Special Tools .
Remove the right camshaft position actuator housing. DO NOT remove the actuator solenoids from the housing. Refer to Camshaft Position Actuator Housing Replacement - Right Side .

Fig 2: Identifying EN 46328 Cam Tool

Courtesy of GENERAL MOTORS CORP.

CAUTION: Refer to Camshaft Holding Tool Caution .

Install the EN 46328 (1) on the bank 1 (right) camshafts (2). See Special Tools .

Fig 3: View Of Right Secondary Timing Chain Tensioner & Bolts

Courtesy of GENERAL MOTORS CORP.

Loosen and remove the right secondary timing chain tensioner bolts and tensioner. Refer to Secondary Camshaft Drive Chain Tensioner Replacement - Right Side .

Fig 4: Preventing Camshaft Rotation

Courtesy of GENERAL MOTORS CORP.

Use an open-end wrench on the hex cast into the camshaft in order to prevent the camshaft from rotating when removing the camshaft oil control valve.
Loosen and remove the bank 1 (right) exhaust camshaft position oil control valve.
Slide the right exhaust camshaft position actuator off of the camshaft and remove the secondary timing chain from the camshaft actuator teeth.

Fig 5: Holding Camshaft In Position

Courtesy of GENERAL MOTORS CORP.

Use an open-end wrench on the hex cast into the camshaft in order to prevent the camshaft from rotating when removing the camshaft oil control valve.
Loosen and remove the bank 1 (right) intake camshaft position oil control valve.
Slide the right intake camshaft position actuator off of the camshaft and remove the secondary timing chain from the camshaft actuator teeth.
Remove the right secondary timing chain from the engine.
Clean and inspect the camshaft timing drive components. Refer to Camshaft Timing Drive Components Cleaning and Inspection .