Tighten down nuts (rear of engine bay) to specified torque.
Replace screws (2), tighten to specified torque and then to angle of rotation.
What does angle of rotation refer to? Also, the instructions refer to a special tool, is this just a torque wrench?

My concern here was that they are pre-tensioned somehow and it might be unwise to remove them, or am i worrying unnecessarily?
Thanks in advance. RC