Cylinder Head Bolts:
* Stage 1: 20 Nm
* Stage 2: 45 Nm
* Final: 60 Nm + an additional 90 degrees
Additional Notes:
* Follow the recommended tightening sequence as outlined in the Nissan ZD30 engine service manual.
* Use a torque wrench to ensure accurate tightening of the cylinder head bolts.
* Always consult the Nissan ZD30 engine workshop manual or relevant technical documentation for specific torque settings and tightening procedures.