Installation Procedure

WARNING: This page is about a different car, the 2003 GMC Envoy XL and 2003 Chevrolet TrailBlazer. However, it is still accessible from the selected car via links, so may be relevant.

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

Fig 1: Installing Key Into Crankshaft Keyway
Courtesy of GENERAL MOTORS CORP.
Tap the key (1) into the keyway until both ends of the key bottom onto the crankshaft.

Fig 2: Tapping Key Into Keyway
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Install the crankshaft sprocket onto the front of the crankshaft. Align the crankshaft key with the crankshaft sprocket keyway.

Fig 3: View Of Crankshaft Sprocket
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Use the J 41665 in order to install the crankshaft sprocket.
Install the sprocket onto the crankshaft until fully seated against the crankshaft flange.
Rotate the crankshaft sprocket until the alignment mark is in the 12 o'clock position.

Fig 4: Installing Crankshaft Sprocket
Courtesy of GENERAL MOTORS CORP.
IMPORTANT:
- Properly locate the camshaft sprocket locating pin with the camshaft sprocket alignment hole.
- The sprocket teeth and timing chain must mesh.
- The camshaft and the crankshaft sprocket alignment marks MUST be aligned properly.
  Locate the camshaft sprocket alignment mark in the 6 o'clock position.
Install the camshaft sprocket and timing chain.

Fig 5: Installing Camshaft Sprocket And Timing Chain
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If necessary, rotate the camshaft or crankshaft sprockets in order to align the timing marks.
NOTE: Refer to FASTENER NOTICE in Cautions and Notices.
Install the camshaft sprocket bolts.
Tighten

Tighten the bolts to 35 N.m (26 lb ft).
Install the oil pump. Refer to OIL PUMP, PUMP SCREEN AND DEFLECTOR REPLACEMENT .

Fig 6: Installing Camshaft Sprocket Bolts
Courtesy of GENERAL MOTORS CORP.