Can i reuse head torque bolts on a astra ts 1.8?

It is generally not recommended to reuse head torque bolts on an Astra TS 1.8 or any engine, as these bolts can stretch and lose their integrity during the initial installation. Reusing them can lead to improper torque and potential engine failure. It's best to use new head bolts to ensure a proper seal and reliable performance. Always refer to the manufacturer's specifications and guidelines for the best practices.