Removal Procedure

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

Remove the left camshaft cover. Refer to Camshaft Cover Replacement - Left Side .
Remove the engine oil pump. Refer to Oil Pump Replacement .

Fig 1: Identifying Primary Timing Gear Alignment Marks

Courtesy of GENERAL MOTORS CORP.

Fig 2: View Of Special Tool & Camshafts (Rear Of Head)

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Fig 3: 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.

Create two reference marks (1) using a paint stick to identify the chain link adjacent to each actuator timing mark (2, 3).

Fig 4: View Of Left Secondary Timing Chain Tensioner & Bolts

Courtesy of GENERAL MOTORS CORP.

Remove the 2 bolts attaching the left secondary camshaft drive chain tensioner to the engine block.
Remove the left secondary camshaft drive chain tensioner, allowing the tensioner to expand as you remove it.
Clean and inspect the camshaft timing drive components. Refer to Camshaft Timing Drive Components Cleaning and Inspection .