Timing Chain and Sprockets Cleaning and Inspection

CAUTION: Refer to Safety Glasses Caution .

Dry the components with compressed air.
Inspect the timing chain for binding or wear.

Fig 1: View Of Camshaft & Crankshaft Sprockets Timing Marks Aligned
Courtesy of GENERAL MOTORS CORP.
Inspect the camshaft and crankshaft sprockets for the following conditions:

Fig 2: Identifying Damaged Sprocket Teeth
Courtesy of GENERAL MOTORS CORP.
- Worn teeth (1)
- Damaged teeth (2)
- Chipped teeth (3)
- Worn valleys between the sprocket teeth
Inspect the crankshaft sprocket keyway for wear.

Fig 3: View Of Crankshaft Sprocket
Courtesy of GENERAL MOTORS CORP.
Inspect the crankshaft sprocket oil pump drive splines for wear.