Kia Optima: Special ToolsUse special tools when they are required.

Preparation Of Tools And Measuring Equipment
Removal Of PartsRemoval
1.
Turn the ignition switch OFF and disconnect the battery
negative (-) cable.
2.
Remove the intake manifold (Refer to “Intake And
Exhaust System” in EM ...
Oil Cooler. Repair procedures
...
Trailing Arm. Repair procedures
Replacement
1.
Remove the rear wheel & tire.
Tightening torque:88.3
~ 107.9N.m (9.0 ~ 11.0kgf.m, 65.1 ~ 79.6lb-ft)
...