Timing Chain and Sprockets Replacement
Timing Chain and Sprockets Replacement^ Tools Required
- J 5825-A Crankshaft Gear Remover
Removal Procedure
1. Remove the engine front cover.
2. Rotate the crankshaft until the timing marks in the following locations are aligned:
^ The timing chain dampener to the crankshaft sprocket (2).
^ The timing chain dampener to the camshaft sprocket locator hole (1).
3. Remove the camshaft sprocket bolt.
4. Remove the camshaft sprocket with the timing chain.
5. Use the J 5825-A in order to remove the crankshaft sprocket.
6. Remove the timing chain dampener bolts.
7. Remove the timing chain dampener.
8. If necessary remove the camshaft thrust plate bolts.
9. Remove the camshaft thrust plate.
10. Clean and inspect the timing chain and gears.
Installation Procedure
1. Install the camshaft thrust plate.
Notice: Refer to Fastener Notice in Service Precautions.
2. Install the camshaft thrust plate bolts.
Tighten the camshaft thrust plate bolts to 10 Nm (89 inch lbs.).
3. Install the crankshaft sprocket using the J 38612.
4. Remove the J 38612.
5. Apply Engine Oil Supplement (EOS) GM P/N 1052367 (Canadian P/N 992869) or equivalent to the sprocket thrust surface.
6. Install the timing chain dampener to the block.
Tighten the timing chain dampener bolts to 21 Nm (15 ft. lbs.).
7. Hold the camshaft sprocket with the chain hanging down, and install the chain to the crankshaft gear.
8. Align the crankshaft timing mark to the timing mark on the bottom of the timing chain dampener (2).
9. Hold the camshaft sprocket with the timing chain hanging down and install the timing chain to the crankshaft gear.
10. Align the timing mark on the camshaft gear with the timing mark on top of the timing chain dampener (1).
11. Install the camshaft sprocket bolt.
12. Draw the camshaft sprocket onto the camshaft using the mounting bolt.
Tighten the camshaft sprocket bolt to 140 Nm (103 ft. lbs.).
13. Coat the crankshaft and camshaft sprocket with engine oil.
14. Install the engine front cover.