Secondary Camshaft Intermediate Drive Chain Installation - Left Side (First Design - 2007)

Tools Required

• EN 46105  Camshaft Holding Tool. See Special Tools .
• EN 46111  Crankshaft Rotation Socket. See Special Tools .

Fig 1: Installing EN 46105-1
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IMPORTANT:
• To determine camshaft timing drive design Refer to Camshaft Timing Drive Design Identification .
• There should be no need to rotate the camshaft more than 10 degrees. Using the hex cast into the camshaft rotate the camshaft in order to install the EN 46105  . See Special Tools .
1. Install the EN 46105-1 onto the rear of the left camshafts.
IMPORTANT: All camshafts must be locked in place before installation of any camshaft drive chains.
2. Ensure that the EN 46105-1 is fully seated onto the camshafts.
Fig 2: Aligning Stage One Timing Mark On Oil Pump Cover
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3. Ensure the crankshaft is in the stage one timing position with the crankshaft sprocket timing mark (1) aligned to the stage one timing mark on the oil pump cover (2) using the EN 46111  . See Special Tools .
Fig 3: Left Secondary Camshaft Drive Chain
Courtesy of GENERAL MOTORS CORP.
4. Install the left secondary camshaft drive chain.
Fig 4: Camshaft Drive Chain Link
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5. Place the left secondary camshaft drive chain around the inner sprocket of the left camshaft intermediate drive chain idler with the timing camshaft drive chain link (1) aligned to the alignment access hole (2) made in the left camshaft intermediate drive chain idler outer sprocket.
Fig 5: Identifying 7 Links Between The Timing Camshaft Drive Chain Links For The Camshaft Position Actuator Sprockets
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6. Wrap the secondary camshaft drive chain around both left actuator drive sprockets.
7. Ensure there are 7 links (1) between the timing camshaft drive chain links for the camshaft position actuator sprockets.
Fig 6: Locating Left Exhaust Camshaft Position Actuator Sprocket Alignment Circle Mark
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8. Align the left exhaust camshaft position actuator sprocket alignment circle mark (2) with the timing camshaft drive chain link (1).
Fig 7: View Of Timing Camshaft Drive Chain Link & Left Intake Camshaft Position Actuator Sprocket Alignment Circle Mark
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9. Align the left intake camshaft position actuator sprocket alignment circle mark (1) with the timing camshaft drive chain link (2).