Kia Optima: Removal - Brake Booster. Repair procedures - Brake System - Brake System - Kia Optima TF 2011-2024 Service ManualKia Optima: Removal

Brake Booster

1. Turn ignition switch OFF and disconnect the negative (-) battery cable.
2. Remove the air duct (B) and air cleaner assembly (A).

3. Disconnect the vacuum hose (A) from the brake booster.

4. Remove the master cylinder. (Refer to Master Cylinder)
5. Remove the snap pin (A) and clevis pin (B).

6. Remove the mounting nuts.

Tightening torque:

12.7 ~ 15.7 N.m (1.3 ~ 1.6 kgf.m, 9.4 ~ 11.6 lb-ft)


7. Remove the brake tube.

8. Remove the brake booster.

Vacuum Pump
1. Turn ignition switch OFF.
2. Remove the under covers (A, B).

Tightening torque:

9.8 ~ 11.8 N.m (1.0 ~ 1.2 kgf.m, 7.2 ~ 8.7 lb-ft)


When removing the under cover (B), unfasten the mounting bracket bolts and then remove the under cover and mounting bracket assembly.
3. Disconnect the vacuum pump connector (A).

4. Disconnect the vacuum hose (A).

5. Loosen the vacuum pump bracket bolts (A), and then remove vacuum pump and bracket.

Tightening torque:

19.6 ~ 29.4 N.m (2.0 ~ 3.0 kgf.m, 14.5 ~ 21.7 lb-ft)


6. Remove the 2 bolts, and then remove the bracket from vacuum pump.

Brake Booster Operating Test
For simple checking of the brake booster operation, carry out the following tests. 1. Run the engine for one or two minutes, and then stop it. If the pedal depresses fully the first time ...

Inspection
Brake Booster 1. Inspect the check valve in the vacuum hose, intensifier and the connecting section. ...

See also:

Removal and Installation
1. Disconnect the terminals from the battery. Tightening torque :(+) terminal (A) : 7.8 ~ 9.8N.m (0.8 ~ 1.0kgf.m, 5.8 ~ 7.2lb-ft) (-) terminal (B) : 4.0 ...

Dimensions Projected
1. These are the dimensions measured when the measurement points are projected from the vehicle's surface, and are the reference dimensions used for used for body alterations ...

Auto door lock/unlock feature (if equipped)
All doors will automatically lock when the transaxle shift lever is shifted out of P (Park). All doors will automatically unlock when the transaxle shift lever is shifted into P (Park). ...

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