For 1990-2009 cars

1. Inspect the timing chain sprockets for cracks or teeth that are worn, broken, or chipped.
2. Inspect the dowel pin for wear or damage.
3. Inspect the timing chain for binding or stretching.
4. Inspect the crankshaft sprocket keyway and locating dowel pin in the crankshaft for damage.
5. Inspect the timing chain shoe and guide for excessive wear or cracks.
6. Inspect the timing chain tensioner for damage.
7. Replace the timing chain and sprockets if damaged.