Camshaft Timing Chain and Sprocket Cleaning and Inspection

WARNING: This page is about a different variant/trim than selected.

Fig 1: Identifying Timing Chain and Sprockets Inspection Areas

Courtesy of GENERAL MOTORS CORP.

WARNING: Refer to Safety Glasses Warning .

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)