Gas distribution mechanism drive device (Opel Insignia A)

1. Upper front timing belt cover.
2. Camshaft sprocket bolts.
3. Camshaft sprocket washers.
4. Intake camshaft sprocket.
5. Exhaust camshaft sprocket.
6. Rear timing belt cover.
7. Timing belt rear cover bolt.
8.Timing belt of the gas distribution mechanism.
9. Timing belt tensioner bolt.
10. Timing belt tensioner.
11. Front engine cover (with oil pump assembly).
12. Timing belt drive idler pulley.
13. Crankshaft sprocket.
14. Timing belt idler pulley bolt.
15. Lower front timing belt cover.
16. Crankshaft pulley bolt.
17. Crankshaft pulley washer.
18. Crankshaft pulley.
19. Upper front timing belt cover bolt.