Kia Forte: Front Suspension System / Front Lower Arm

Kia Forte 2019-2025 (BD) Service Manual / Suspension System / Front Suspension System / Front Lower Arm

Repair procedures

Removal and Installation

Remove the front wheel and tire (A).

Tightening torque:

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

Be careful not to damage to the hub bolts when removing the front wheel and tire.

Remove the lower arm nut (A).

Tightening torque:

58.8 - 70.6 N·m (6.0 - 7.2 kgf·m, 43.4 - 52.1 lb·ft)

Detach the front lower arm from the front knuckle using the SST (09568-1S100).

•	When using SST, be sure not to damage the dust cover of lower arm ball joint.

•	Keep SST tied to the car because there is a risk of injury by dropping the SST during removing the lower arm ball joint.

•	The peripheral parts may be damaged when removing the lower arm ball joint with a general tool such as lever, so be sure to use SST.

Remove the lower arm (A) from the sub frame.

Tightening torque:

Bolt (B) : 117.7 - 137.3 N·m (12.0 - 14.0 kgf·m, 86.8 - 101.3 lb·ft)

Bolt (C) : 156.9 - 176.5 N·m (16.0 - 18.0 kgf·m, 115.7 - 130.2 lb·ft)

5.	Install in the reverse order of removal.

6.	Check the wheel alignment. (Refer to Front Suspension System - "Front Alignment")

Disassembly

Disconnect the ball joint after loosening the nut (A).

Tightening torque :

117.7 - 137.3 N·m (12.0 - 14.0 kgf·m, 86.6 - 101.3 lb·ft)

•	Using a plastic hammer, remove the ball joint.

•	Do not to damage to the lower arm.

Install a new ball joint and then tighten the nut (A).

Tightening torque :

117.7 - 137.3 N·m (12.0 - 14.0 kgf·m, 86.6 - 101.3 lb·ft)

When replace the ball joint with a new one, insert the bolt(A) into the ball joint with a certain pressure.

Insert the bolt to the ball joint without any gap.

Inspection

1.	Check the bushing for wear and deterioration.

2.	Check the lower arm for bending or breakage.

3.	Check the lower arm for deformation.

4.	Check all bolts and nuts.

Check the ball joint rotating torque.

If there is an abnormality, replace the ball joint.

Standard value : 9.8 - 29.4 N·m (1.0 - 3.0 kgf·m, 7.2 - 21.7 lb-ft)

(1)	Move the ball stud (A) 5 times to the front and back, and rotate 5 times to evenly apply the grease. Fix the ball stud stationary for 24 hours at the center, then roll 3 times to the front and back, and rotate 3 times before measuring the torque.

(2)

Read the constant torque value within 180° when it is rotated at speed of approximately 12°/s.

Standard value : 9.8 - 29.4 N·m (1.0 - 3.0 kgf·m, 7.2 - 21.7 lb-ft)

(3)	Make sure that the ball stud rotates smoothly.

6.	Check the ball stud(A) axial free play, In case of any free play exist, replace the ball joint(B).

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