- Inspect the timing chain
sprockets for  cracks or teeth that are worn, broken, or chipped.
 
- Inspect the timing chain for binding or stretching.
 
- Inspect the dowel pins for wear or damage
 
- Inspect the crankshaft sprocket keyway and the locating dowel
pins in the crankshaft for damage.
 
- Inspect the timing chain shoe and guide for excessive wear or
 cracks.
 
- Inspect the timing chain tensioner for damage.
 
- Replace the timing chain and sprockets if damaged.