Subframe
Repair Procedures
Removal
Disconnect the negative (-) battery cable.
Loosen the bolt (A) and remove the universal joint (B).
Tightening Torque: 49.0–59 N·m

Remove the front wheel and tire.
(Refer to Tires/Wheels — "Wheel")
Disconnect the stabilizer link from the front strut assembly after loosening the nut (A).
Tightening torque: 98.1 - 118 N·m

Disconnect the tie rod end ball joint from the steering knuckle using SST (09568-2J100).
Remove the cotter pin (C).
Remove the castle nut (B) and washer (A).
Tightening torque: 98.1 - 118 N·m

Disconnect the tie rod end ball joint from the steering knuckle using SST (09568-2J100).

Loosen the lower arm mounting nut (A).
Remove the stop pin (A).
Remove the lower arm mounting nut (B) and washer (C).
Tightening torque: 98.1 - 118 N·m

Disconnect the lower arm ball joint from the steering knuckle using SST (0K545-A9100).
After removing the bolts from the front steering knuckle, install and tighten the body bolt (A) at the bottom.

Insert the auxiliary body (B) between the front knuckle and the auxiliary body bolt.
Tighten the auxiliary body bolt (C) to increase the clearance of the front joint.

Install the safety wire and the main body (A) between the front strut and the lower arm.

After installing the body (A), turn the handle (B) clockwise to secure it to the lower arm with the clamp.

Slowly tighten the main body bolt (A) and separate the lower arm from the front joint.

Remove the engine room cover.
G 2.0 NU MPI (Refer to Engine Mechanical System - "Engine Compartment Cover")
G 2.5 GDI THETA II (Refer to Engine Mechanical System - "Engine Compartment Cover")
Separate the roller link bracket (C) after loosening the bolts (A) and (B).
Tightening Torque
(A): 107,8–127 N·m
(B): 49,0–64 N·m

Remove the heat shield (A).

Remove the muffler rubber mount (A).

Remove the clip (A).

Remove the subframe.
Loosen the front subframe stopper bolts (A).
Tightening Torque: 44.1–59 N·m
[LH]

[RH]

Loosen the rear subframe stopper bolts (A).
Tightening Torque: 44.1–59 N·m
[LH]

[RH]

Support the subframe securely with a jack (A).

Loosen the mounting nut and remove the front subframe mount (A).
Tightening torque: 176.6–196 N·m
[LH]

[RH]

Loosen the mounting nut and remove the rear subframe mount (A).
Tightening torque: 176.6–196 N·m
[LH]

[RH]

Slowly lower the jack to remove the subframe.

Remove the bolts and remove the steering gear heat shield (A).
Tightening torque: 7.8–11.7 N·m

Remove the steering gear box (A) from the front subframe by loosening the mounting bolts.
Tightening torque: 107.9–128 N·m

Loosen the mounting bolts and remove the stabilizer bar (A).
Tightening Torque: 49.0–64 N·m

Remove the lower arm (A).
Tightening Torque
Bolt (B): 157.0 – 177 N·m lb·ft)
Nut (C): 157.0 – 177 N·m lb·ft)

Remove the dynamic damper (A).
Tightening Torque: 44.1–54 N·m

Test yourself
A quick Kia Optima DL3 quiz: every answer comes with an explanation and a link to the manual page.