For 1990-2009 cars

#### Tools Required

J 38612 Crankshaft Sprocket Installer

1. Install the crankshaft sprocket using the J 38612 .
2. Apply GM EOS P/N 1052367 or equivalent to the sprocket thrust surface.
3. Install the chain dampener to the block.
4. Align the crankshaft timing mark to the timing mark on the bottom of the chain dampener.
5. Hold the camshaft sprocket with the chain hanging down and install the chain to the crankshaft gear.
6. Align the timing mark on the camshaft gear (center line of the locator hole) with the timing mark on top of the chain dampener.
7. Remove the J 38612 .
8. Align the dowel in the camshaft with the dowel hole in the camshaft sprocket.
9. Draw the camshaft sprocket onto the camshaft using the mounting bolt.
10. Coat the crankshaft and camshaft sprocket with engine oil.

Tighten
Tighten the bolt to 110 N·m (81 lb ft).

Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.