Owner's Manual: The timing belt diagram is usually included in the vehicle's owner's manual. This is the most reliable source for information about your specific vehicle.
Online: You can find timing belt diagrams for the Vauxhall Astra 1.6 8v online. Some websites that provide timing belt diagrams include:
- [Haynes Manuals](https://www.haynes.com/en-gb/)
- [AutoZone](https://www.autozone.com/)
- [Advance Auto Parts](https://www.advanceautoparts.com/)
Automotive Repair Manuals: You can also find timing belt diagrams in automotive repair manuals. Some popular automotive repair manuals that include timing belt diagrams for the Vauxhall Astra 1.6 8v include:
- [Chilton's Repair Manual](https://www.chiltonlibrary.com/)
- [Mitchell 1 ProDemand](https://www.mitchellrepair.com/)
Note: It is important to follow the timing belt diagram carefully when replacing the timing belt. If the timing belt is installed incorrectly, it can cause serious engine damage.