Timing Chain and Sprockets Cleaning and Inspection

WARNING: This page is about a different car, the 2003 GMC Sierra, 2003 GMC Cab & Chassis Sierra, 2003 Chevrolet Silverado, and 2003 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.

Clean the components with cleaning solvent.
CAUTION: Refer to SAFETY GLASSES CAUTION .
Dry the components with compressed air.
Inspect the timing chain for binding or wear.

Fig 1: Inspecting Timing Chain For Binding Or Wear
Courtesy of GENERAL MOTORS CORP.
Inspect the camshaft and crankshaft sprockets for:
- Worn teeth (1)
- Damaged teeth (2)
- Chipped teeth (3)
- Worn valleys between the sprocket teeth
Fig 2: Inspection Points For Camshaft & Crankshaft Sprockets
Courtesy of GENERAL MOTORS CORP.
Inspect the crankshaft sprocket keyway for wear.
Inspect the crankshaft sprocket oil pump drive splines for wear.

Fig 3: Inspecting Crankshaft Sprocket Oil Pump Drive Splines
Courtesy of GENERAL MOTORS CORP.