Cylinder head torque on a astra g 1.6 8v?

For the Astra G 1.6 8V engine, the cylinder head torque specification is typically around 20 Nm (15 lb-ft) for the initial pass, followed by a final torque of approximately 30 Nm (22 lb-ft). It's important to follow the recommended sequence for tightening the bolts to ensure an even distribution of pressure. Always consult the vehicle's service manual for the specific torque values and procedures, as they may vary slightly based on the model year and engine variant.