Kia Sedona (2008 year). Manual — part 267

3. Piston (Frozen)

replace

4. Disc (Scored)

replace

5. Pad or lining (Cracked or
distorted)

replace

Hard pedal but brake inefficient

1. Brake system (Fluid leaks)

repair

2. Brake system (Air in)

air-bleed

3. Pad or lining (Worn)

replace

4. Pad or lining (Cracked or
distorted)

replace

5. Rear brake shoe clearance (Out
of adjustment)

adjust

6. Pad or lining (Oily)

adjust

7. Pad or lining (Glazed)

replace

8. Disc (Scored)

replace

9. Booster system (Vacuum leaks)

repair

Noise from brake

1. Pad or lining (Cracked or
distorted)

replace

2. Installation bolt (Loosen)

adjust

3. Disc (Scored)

replace

4. Sliding pin (Worn)

replace

5. Pad or lining (Dirty)

clean

6. Pad or lining (Glazed)

replace

7. Anchor or Return spring
(Inoperative)

replace

8. Brake pad shim (Damage)

replace

9. Shoe hold-down spring
(Damage)

replace

Brake fades

1. master cylinder

replace

Brake vibration, pulsation

1. brake booster

replace

2. pedal free play

adjust

3. master cylinder

replace

4. caliper

replace

5. master cylinder cap seal

replace

6. damaged brake lines

replace

Brake Chatter

Brake chatter is usually caused by
loose or worn components, or
glazed or burnt linings. Rotors
with hard spots can also contribute
to brake chatter. Additional causes
of chatter are out-of-tolerance
rotors, brake lining not securely
attached to the shoes, loose wheel
bearings and contaminated brake
lining.

2008 Kia Sedona

2008 BRAKES Brake System - General - Sedona

Microsoft

Saturday, May 22, 2010 6:55:01 PM

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© 2006 Mitchell Repair Information Company, LLC.

2008 BRAKES

Brake System - Sedona

OPERATION AND LEAKAGE CHECK

CHECK ALL OF THE FOLLOWING ITEMS:

BRAKE SYSTEM CHECKING PROCEDURE

Component

Procedure

Brake Booster (A)

Check brake operation by applying the brakes during a test drive. If the brakes do
not work properly, check the brake booster. Replace the brake booster as an
assembly if it does not work properly or if there are signs of leakage.

Piston cup and
pressure cup
inspection (B)



Check brake operation by applying the brakes. Look for damage or signs of
fluid leakage. Replace the master cylinder as an assembly if the pedal does not
work properly or if there is damage or signs of fluid leakage.



Check for a difference in brake pedal stroke between quick and slow brake
applications. Replace the master cylinder if there is a difference in pedal
stroke.

Brake hoses (C)

Look for damage or signs of fluid leakage. Replace the brake hose with a new one if
it is damaged or leaking.

Caliper piston seal
and piston boots
(D)

Check brake operation by applying the brakes.
Look for damage or signs of fluid leakage. If the pedal does not work properly, the
brakes drag, or there is damage or signs of fluid leakage, disassemble and inspect the
brake caliper. Replace the boots and seals with new ones whenever the brake caliper
is disassembled.

2008 Kia Sedona

2008 BRAKES Brake System - Sedona

2008 Kia Sedona

2008 BRAKES Brake System - Sedona

Microsoft

Saturday, May 22, 2010 6:54:26 PM

Page 1

© 2006 Mitchell Repair Information Company, LLC.

Microsoft

Saturday, May 22, 2010 6:54:30 PM

Page 1

© 2006 Mitchell Repair Information Company, LLC.

Fig. 1: Hydraulic Brake System Component Locations
Courtesy of KIA MOTORS AMERICA, INC.

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 but

gradually becomes higher when depressed succeeding times, the booster is operating properly, if the
pedal height remains unchanged, the booster is inoperative.

Fig. 2: Checking Brake Booster Performance (1 Of 3)
Courtesy of KIA MOTORS AMERICA, INC.

2008 Kia Sedona

2008 BRAKES Brake System - Sedona

Microsoft

Saturday, May 22, 2010 6:54:27 PM

Page 2

© 2006 Mitchell Repair Information Company, LLC.

2. With the engine stopped, step on the brake pedal several times.

Then step on the brake pedal and start the engine. If the pedal moves downward slightly, the booster is in
good condition. If there is no change, the booster is inoperative.

Fig. 3: Checking Brake Booster Performance (2 Of 3)
Courtesy of KIA MOTORS AMERICA, INC.

3. With the engine running, step on the brake pedal and then stop the engine.

Hold the pedal depressed for 30 seconds. If the pedal height does not change, the booster is in good
condition, if the pedal rises, the booster is inoperative. If the above three tests are okay, the booster
performance can be determined as good.

Even if one of the above three tests is not okay, check the check valve, vacuum hose and booster for
malfunction.

Fig. 4: Checking Brake Booster Performance (3 Of 3)
Courtesy of KIA MOTORS AMERICA, INC.

VACUUM HOSE (CHECK VALVE)

2008 Kia Sedona

2008 BRAKES Brake System - Sedona

Microsoft

Saturday, May 22, 2010 6:54:27 PM

Page 3

© 2006 Mitchell Repair Information Company, LLC.