Installation Procedure

WARNING: This page is about a different car, the 2007 GMC Sierra and 2007 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: View Of Crankshaft Key & Keyway

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Install the key into the crankshaft keyway, if previously removed.

Fig 2: View Of Installed Crankshaft Key

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Tap the key (122) into the keyway until both ends of the key bottom onto the crankshaft.

Fig 3: View Of Crankshaft Sprocket

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Install the crankshaft sprocket (207) onto the front of the crankshaft. Align the crankshaft key with the crankshaft sprocket keyway.

Fig 4: View Of Crankshaft Sprocket & Installer

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Use the J 41478 (1) and the J 41665 (2) in order to install the crankshaft sprocket. See Special Tools . Install the sprocket onto the crankshaft until fully seated against the crankshaft flange.

Fig 5: View Of Compressed Tensioner

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Compress the timing chain tensioner guide and install the EN 46330 . See Special Tools .

Fig 6: View Of Timing Chain Tensioner & Bolts

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Install the timing chain tensioner (232) and bolts (231).
Tighten: Tighten the bolts to 25 N.m (18 lb ft).

Fig 7: View Of Camshaft Sprocket & Timing Chain

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IMPORTANT:

The sprocket teeth and timing chain must mesh.
The camshaft and the crankshaft sprocket alignment marks MUST be aligned properly.

Position the camshaft sprocket (205) so the timing mark is in the 6 o'clock position.
Install the camshaft sprocket (205), timing chain (208), and bolt (206).

Fig 8: Identifying Camshaft & Crankshaft Marks

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Inspect the sprockets for proper alignment. The mark on the camshaft sprocket (1) should be located in the 6 o'clock position and the mark on the crankshaft sprocket (2) should be located in the 12 o'clock position.

Fig 9: Locating Tensioner Pin

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Remove the EN 46330 . See Special Tools .

Fig 10: Identifying Camshaft Sprocket Bolt Tightening Sequence

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Tighten the camshaft sprocket bolt
Tighten:
1. Tighten the bolt a first pass to 75 N.m (55 lb ft).
2. Tighten the bolt a final pass an additional 50 degrees using J 45059 .

Fig 11: View Of Special Tool & Bolts

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Remove the J 42386-A (1) and bolts. See Special Tools .
Install the starter motor. Refer to Starter Motor Replacement (4.3L) or Starter Motor Replacement (4.8L, 5.3L, 6.0L, and 6.2L) or Starter Motor Replacement (6.6L) .
Install the oil pump. Refer to Oil Pump, Screen, and Crankshaft Oil Deflector Replacement (LY6, L76 and L92) or Oil Pump, Screen, and Crankshaft Oil Deflector Replacement (LH6, LMG, LY2 and LY5) .