Timing Chain and Sprockets Cleaning and Inspection

Inspect the timing chain sprockets for teeth that are worn (1), broken (2), or chipped (3).
Inspect the timing chain for binding or stretching.
Inspect the timing chain dampener for excessive wear or cracks.
Replace the timing chain and sprockets as needed.

Fig 1: Inspect The Timing Chain Sprockets Teeth
Courtesy of GENERAL MOTORS CORP.