Kia Optima: Driveshaft and axle / Front Axle Assembly

Kia Optima DL3 2019-2025 Service and Repair Manual / Driveshaft and axle / Front Axle Assembly

Components and components location

Components

1. Front brake disc
2. Front hub assembly

3. Dust cover
4. Front knuckle

Repair procedures

Removal

1.	Disconnect the (-) battery terminal.

2.	Remove the front wheel and tire. (Refer to Suspension System - "Wheel")

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).

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.

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.

By hammering on a chisel, unlock the driveshaft lock hub nut caulking.

If there is screw thread (A) on the end of the nut, unlock the caulking by using a chisel and then loosen the nut to prevent damaging driveshaft screw thread.

Remove the caulking nut (A) from the front axle.

Tightening torque :

294.2 - 313.8 N·m (30.0 - 32.0 kgf·m, 217.0 - 231.5 lb·ft)

•	The driveshaft lock nut must be replaced with new one. When replacing the drive lock hub nut, use only the nut with screw thread (A) on the end.

•	When replacing the drive lock hub nut, use only the nut with screw thread (A) on the end.

•	Tighten the driveshaft lock hub nut to the specified tightening torque, and caulk by using a chisel and hammer.

•

If there are two key seats, perform on all two seats.

Caulking depth (A) : 1.5 mm (0.0591 in)

Disconnect the driveshaft from the axle hub by using the SST (09517-4E000).

Removing the driveshaft, do not force pull or over deflect the axle.

9.	Remove the front brake caliper assembly. (Refer to Brake System - "Front Brake Caliper")

10.

Separate the front wheel speed sensor (A) after loosening the bolt.

Tightening torque :

6.9 - 10.8 N·m (0.7 - 1.1 kgf·m, 5.1 - 8.0 lb·ft)

11.

Remove the front axle (A) after loosening the front strut bolts and nuts.

Tightening torque :

196.1 - 215.7 N·m (20.0 - 22.0 kgf·m, 144.7 - 159.1 lb·ft)

Installation

1.	Install in the reverse order of removal.

2.	Check the front alignment. (Refer to Suspension System - "Alignment")

Disassembly

Remove the front brake disc (A) after loosening the screws.

Tightening torque :

4.9 - 5.9 N·m (0.5 - 0.6 kgf·m, 3.6 - 4.3 lb·ft, 43.4 - 52.1 lb·in)

Loosen the hub bearing mounting bolts.

Tightening torque:

127.5 - 147.1 N·m (13.0 - 15.0 kgf·m, 94.0 - 108.5 lb·ft)

Remove the dust cover (A) from the knuckle.

Tightening torque:

6.9 - 10.8 N·m (0.7 - 1.1 kgf·m, 5.1 - 8.0 lb·ft)

Reassembly

1.	Assemble in the reverse order of disassembly.

Inspection

1.	Check the hub for cracks and the splines for wear.

2.	Check the brake disc for scoring and damage.

3.	Check the knuckle for cracks.

4.	Check the bearing for cracks or damage.

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