Timing Chain and Sprockets Cleaning and Inspection

WARNING: This page is about a different car, the 2007 GMC Sierra and 2007 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: View Of Camshaft & Crankshaft Sprocket Timing Marks

Courtesy of GENERAL MOTORS CORP.

CAUTION: Refer to SAFETY GLASSES CAUTION .

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

Fig 2: Identifying Damaged Sprocket Teeth

Courtesy of GENERAL MOTORS CORP.

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