Timing Chain and Sprocket

TOOL REQUIRED
^ J 5825-A Crankshaft Sprocket Remover
^ J 38612 Crankshaft Sprocket Installer

REMOVAL
1. Remove the [1][2]engine front cover.





2. Rotate the crankshaft until the timing marks in the following locations are aligned:
^ The crankshaft sprocket
^ The camshaft sprocket locator hole
^ The engine block
^ The timing chain dampener
^ The number 1 piston is at dead center.





3. Remove the camshaft sprocket bolt.
4. Remove the camshaft sprocket.
5. Remove the timing chain.





6. Use the Crankshaft Sprocket Remover in order to remove the crankshaft sprocket.
7. Remove the timing chain dampener bolts.





8. Remove the timing chain dampener.

INSTALLATION





1. Install the crankshaft sprocket using the Crankshaft Sprocket Installer.
2. Apply GM EOS P/N 1052367 or equivalent to the sprocket thrust surface.
3. Install the timing chain dampener to the block. Tighten the timing chain dampener bolts to 21 Nm (15 ft. lbs.).
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 the top of the chain damper.
7. Remove the Crankshaft Sprocket Installer.
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.
11. Install the bolt. Tighten the bolt to 110 Nm (81 ft. lbs.).
12. Install the [1][2]engine front cover.