In order the replace the valve cover gasket you will have to remove few components.
Since you did not mention what is the engine size (2.0L or 3.0L), I have included the valve cover gasket replacement procedure for both engines. See below.
Also, you will find the torque specifications on these instructions.
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.