M8 bolts:
- Tighten in three stages to 20 Nm, 40 Nm, and then 60 Nm
- Retighten the bolts after the engine has cooled down
M10 bolts:
- Tighten in three stages to 40 Nm, 60 Nm, and then 80 Nm
- Retighten the bolts after the engine has cooled down
M12 bolts:
- Tighten in three stages to 60 Nm, 80 Nm, and then 100 Nm
- Retighten the bolts after the engine has cooled down
Note: It is important to follow the correct torque specifications to ensure that the cylinder head is properly sealed and to prevent damage to the engine.