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: Identifying Timing Chain & Sprockets Inspection Areas

Courtesy of GENERAL MOTORS CORP.

Clean the components with cleaning solvent.

CAUTION: Refer to Safety Glasses and Compressed Air Caution .

Dry the components with compressed air.
Inspect the timing chain (1) for binding or wear.
Inspect the camshaft position (CMP) sensor raised areas (2) for nicks or damage.
Inspect for worn, damaged, or chipped teeth (3).
Inspect for a damaged keyway (4).
Inspect for worn oil pump drive splines (5).

Fig 2: View Of Timing Chain Tensioner Inspection Points

Courtesy of GENERAL MOTORS CORP.

Inspect the timing chain tensioner for the following conditions:
- Damaged or broken tension spring (1)
- Excessive wear or scoring on the chain guide surfaces (2, 3)