Kia Optima: Steering System

Kia Optima DL3 2019-2020 Service and Repair Manual / Steering System

Service data
Service Data

Item
Specification
Type
Electric Power Steering System
Steering gear
Type
Rack & Pinion
Rack stroke
156 ± 1 mm (6.14 ± 0.0039 in)
Steering angle (Max.)
Inner
39.7° + 0.5 / -1.5
Outer
33.9°

Tightening torque
Tightening Torque

Item
N·m
kgf·m
lb·ft
Tire wheel hub nut
107.9 - 127.5
11.0 - 13.0
79.6 - 94.0
Universal joint to steering column assembly
49.0 - 58.8
5.0 - 6.0
36.2 - 43.4
Steering column mounting nuts
25.0 - 29.4
2.5 - 3.0
14.5 - 21.7
Steering column mounting bolt
53.9 - 58.8
5.5 - 6.0
39.8 - 43.4
Tie rod end front axle
98.1 - 117.7
10.0 - 12.0
72.3 - 86.8
Tie rod end mounting nut
49.0 - 53.9
5.0 - 5.5
36.2 - 39.8
Lower arm ball joint bolts
98.1 - 117.7
10.0 - 12.0
72.3 - 86.8
Steering gear box mounting bolts
107.9 - 127.5
11.0 - 13.0
79.6 - 94.0
Universal joint to pinion of steering gear
49.0 - 58.8
5.0 - 6.0
36.2 - 43.4
Steering wheel mounting bolt
39.2 - 49.0
4.0 - 5.0
28.9 - 36.2

Special service tools
Special Service Tools

Tool Name / Number
Illustration
Description
Ball joint puller
09568-2J100

Use for removal of ball joint

Lower arm ball joint remover
0K545-A9100

Used for removal of front lower arm ball joint

Troubleshooting
Troubleshooting

Symptom
Probable cause
Remedy
Play in steering
Loose yoke plug
Retighten
Loose steering gear mounting bolts
Retighten
Loose or worn tie rod end
Retighten or replace as necessary
Steering wheel operation is not smooth (Insufficient power assist)
V-belt slippage
Readjust
Damaged V-belt
Replace
Low fluid level
Replenish
Air in the fluid
Bleed air
Twisted or damaged hoses
Correct the routing or replace
Insufficient oil pump pressure
Repair or replace the oil pump
Sticky flow control valve
Replace
Excessive internal oil pump leakage
Replace the damaged parts
Excessive oil leaks from rack and pinion in gear box
Replace the damaged parts
Distorted or damaged gear box or valve body seals
Replace
Steering wheel does not return properly
Excessive turning resistance of tie rod end
Replace
Yoke plug excessively tight
Adjust
Tie rod and/or ball joint cannot turn smoothly
Replace
Loose mounting of gear box mounting bracket Worn steering shaft joint and/or
Retighten
Worn steering shaft joint and / or body grommet
Correct or replace
Distorted rack
Replace
Damaged pinion bearing
Replace
Twisted or damaged hoses
Reposition or replace
Damaged oil pressure control valve
Replace
Damaged oil pump input shaft bearing
Replace
Noise
Hissing Noise in Steering Gear
There is some noise with all power steering systems. One of the most common is a hissing sound when the steering wheel is turned and the car is not moving. This noise will be most evident when turning the wheel while the brakes are being applied. There is no relationship between this noise and steering performance. Do not replace the valve unless the "hissing" noise becomes extreme. A replaced valve will also make a slight noise, and is not always a solution for the condition.
Rattling or chucking noise in the rack and pinion
Interference with hoses from vehicle body
Reposition
Loose gear box bracket
Retighten
Loose tie rod end and / or ball joint
Retighten
Worn tie rod and / or ball joint
Replace
Noise in the oil pump
Low fluid level
Replenish
Air in the fluid
Bleed air
Loose pump mounting bolts
Retighten

Repair procedures
Service adjustment procedure
Steering Wheel Play Inspection
1.

Turn the steering wheel so that the front wheels are facing straight ahead.

2.

Mark the center of the steering wheel.

3.

Measure the distance that the steering wheel can be turned without moving the front wheels.

Standard value : 0 - 30 mm (0 - 1.1811 in.) or less

4.

If the play exceeds standard value, inspect the steering column, shaft, and linkages.

Checking Stationary Steering Effort
1.

Position the vehicle on a level surface and place the steering wheel in the straight ahead position.

2.

Attach a spring scale to the steering wheel. With the idle RPM, pull the scale and read it as soon as the tires begin to turn.

Standard value : 29.4 N (3.0 kgf, 6.6 lb·f) MAX.

3.

If the measured value exceeds standard value, inspect the steering gear box.

TPMS Receiver
Description and operation Description TPMS Receiver : IBU (Integrated Body Control Unit) integrated management 1. Mode (1) Virgin State ...

Steering wheel
Components and components location Components 1. Drive air bag module (DAB) 2. Remote control swtich 3. Steering wheel bezel 4. Steering wheel 5. ...

Other information:

Kia Optima DL3 2019-2020 Service and Repair Manual: Transaxle Control Module (TCM)


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Kia Optima DL3 2019-2020 Owner's Manual: Electronic Stability Control (ESC) Indicator Light


This indicator light illuminates: Once you set the ignition switch or Engine Start/Stop Button to the ON position. - It illuminates for approximately 3 seconds and then goes off. When there is a malfunction with the ESC system. In this case, have your vehicle inspected by an authorized ...

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