Kia Optima DL3: Front Suspension System / Sub Frame

Kia Optima DL3 2019-2026 Service and Repair Manual / Suspension System / Front Suspension System / Sub Frame

Repair procedures

Removal
1.

Disconnect the (-) battery terminal.
2.

Loosen the bolt (A) and remove the universal joint (B).

Tightening torque :

49.0 - 58.8 N.m (5.0 - 6.0 kgf.m, 36.2 - 43.4 lb-ft)

  
•

Secure the steering wheel so that it does not move.
•

Lock the steering wheel in the straight ahead position to prevent the damage of the clock spring inner cable.
•

Do not reuse the bolt.
3.

Remove the front wheel and tire.

(Refer to Tires/Wheels - "Wheel")

4.

Disconnect the stabilizer link with the front strut assembly after loosening the nut (A).

Tightening torque :

98.1 - 117.7 N.m (10.0 - 12.0 kgf.m, 72.3 - 86.8 lb-ft)

  
•

When loosening the nut (A), fix the outer hexagon of stabilizer bar link.
•

Be careful not to damage the stabilizer link boots.
5.

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

(1)

Remove the snap pin (C).
(2)

Remove the lock nut (B) and washer (A).

Tightening torque :

98.1 - 117.7 N·m (10.0 - 12.0 kgf·m, 72.3 - 86.8 lb·ft)

  

Do not reuse mounting nut.
(3)

Disconnect the tie rod end ball joint from the knuckle by using the SST (09568-2J100).
6.

Loosen the lower arm mounting nut (A).

(1)

Remove the snap pin (A).
(2)

Remove the lower arm mounting nut (B) and washer (C).

Tightening torque :

98.1 - 117.7 N·m (10.0 - 12.0 kgf·m, 72.3 - 86.8 lb·ft)

  

To loosen the nut (B), fix the bolt on the opposite side to prevent it from turning.
7.

Disconnect lower arm ball joint from the knuckle by using the SST (0K545-A9100).

(1)

After removing bolts from the front knuckle, install and tighten the sub body bolt (A)
(2)

Input the sub body (B) between the front knuckle and the sub body bolt.

(3)

Tighten the bolt (C) of the sub body to broaden the gap of the front knuckle.
(4)

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

(5)

After installing a body (A), rotate the handle (B) clockwise util the clamp is fixed on the lower arm.
(6)

Tighten the main body bolt (A) slowly and remove the lower arm from the front knuckle.
8.

Remove the engine room under cover.

G 2.0 NU MPI (Refer to Engine Mechanical System - "Engine Room Under Cover")

G 2.5 GDI THETA II (Refer to Engine Mechanical System - "Engine Room Under Cover")

9.

Separate the roll rod bracket (C) after loosening the bolts (A), (B).

Tightening torque

(A) : 107.8 -127.4 N·m (11.0 - 13.0 kgf·m, 79.5 - 94.0 lb·ft)

(B) : 49.0 - 63.7 N.m (5.0 - 6.5 kgf.m, 36.2 - 47.0 lb-ft)

10.

Remove the heat protector (A).
11.

Remove the muffler rubber hanger (A).
12.

Remove the fasner (A).
13.

Remove the sub frame.

  

A : Front sub frame stay

B : Rear sub frame stay
(1)

Loosen the stay bolts (A) from the front sub frame stay.

Tightening torque :

44.1 - 58.8 N.m (4.5 - 6.0 kgf.m, 32.5 - 43.4 lb-ft)

[LH]

[RH]

(2)

Loosen the stay bolts (A) from the rear sub frame stay.

Tightening torque :

44.1 - 58.8 N.m (4.5 - 6.0 kgf.m, 32.5 - 43.4 lb-ft)

[LH]

[RH]

(3)

Support the sub frame securely with the jack (A).

  

If the mission jack is used to remove the subframe, it may tip forward, which may cause injury.
(4)

Loosen the mounting nut and remove the front sub frame stay (A).

Tightening torque :

176.6 -196.2 N·m (18.0 - 20.0 kgf·m, 130.1 - 144.6 lb·ft)

[LH]

[RH]

(5)

Loosen the mounting nut and remove the rear sub frame stay (A).

Tightening torque :

176.6 -196.2 N·m (18.0 - 20.0 kgf·m, 130.1 - 144.6 lb·ft)

[LH]

[RH]

(6)

Slowly lower the jack to remove the sub frame.
14.

Loosen the bolts and remove the steering gear box heat protector (A).

Tightening torque :

7.8 - 11.7 N.m (0.8 - 1.2 kgf.m, 5.7 - 8.6 lb-ft)

15.

Remove the steering gearbox (A) from the front sub frame by loosening the mounting bolts.

Tightening torque :

107.9 - 127.5 N.m (11.0 - 13.0 kgf.m, 79.6 - 94.0 lb-ft)

16.

Loosen the mounting bolts and then remove the stabilizer bar (A).

Tightening torque :

49.0 - 63.7 N.m (5.0 - 6.5 kgf.m, 36.2 - 47.0 lb-ft)

17.

Remove the lower arm (A).

Tightening torque

Bolt (B) : 157.0 - 176.6 N·m (16.0 - 18.0 kgf·m, 115.7 - 130.2 lb·ft)

Nut (C) : 157.0 - 176.6 N·m (16.0 - 18.0 kgf·m, 115.7 - 130.2 lb·ft)

18.

Remove the dynamic damper (A).

Tightening torque :

44.1 - 53.9 N.m (4.5 - 5.5 kgf.m, 32.5 - 39.8 lb-ft)

    Repair procedures Removal 1. Disconnect the (-) battery terminal. 2. Remove the front wheel and tire.

    Components and components location Components and Components Location 1. Trailing arm 2. Rear shock absorber 3. Rear suspension 4.

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