Camshaft Timing Chain and Sprocket Cleaning and Inspection for GMC Truck Sierra - 4WD 2008

Caution: Wear safety glasses in order to avoid eye damage.

1. Clean the components with cleaning solvent.
2. Dry the components with compressed air.
3. Inspect the camshaft timing chain for binding or wear.



4. Inspect the camshaft sprocket and the crankshaft sprocket for:

•	Broken teeth (1)

•	Damaged teeth (2)

•	Chipped teeth (3)

•	Worn teeth

•	Uneven wear on the edge of the teeth

•	Worn valleys between the sprocket teeth

•	Crankshaft sprocket keyway for wear

5. Inspect the timing chain tensioner bracket and shoe for cracking and wear.