Kia Sorento: Front Brake Disc Repair procedures

Kia Sorento (MQ4, 2021-2026) Service Manual / Brake System / Brake System / Front Brake Disc Repair procedures

Removal

1.	Disconnect the (-) battery terminal.

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

Remove the guide rod bolt (A) and then pivot the caliper body (B) up out of the way.

Tightening torque :

37.2 - 41.1 N·m (3.8 - 4.2 kgf·m, 27.4 - 30.3 lb·ft)

Brake System — Brake System / Front Brake Disc / Repair procedures / Removal illustration

4.	Remove the brake pad (A).

5.	Remove the pad retainer (A).

Remove the caliper carrier (B) by removing the flange bolts (A).

Tightening torque :

98.1 - 117.7 N·m (10.0 - 12.0 kgf·m, 72.3 - 86.8 lb·ft)

Brake System — Brake System / Front Brake Disc / Repair procedures / Removal illustration

•	Do not reuse the flange bolts.

•	Fix the caliper assembly with a wire.

Remove the front brake disc (B) by removing the screws (A).

Tightening torque :

4.9 - 5.8 N·m (0.5 - 0.6 kgf·m, 3.6 - 4.3 lb·ft)

Brake System — Brake System / Front Brake Disc / Repair procedures / Removal illustration

Inspection

Disc cleaning before inspection

1.	Check the brake disc for rust.

Spray the cleaing solution on rusted surface of disc.

Cleaning solution : Water-Detergent [Water : 0.08 gal (300 ml) Detergent : 0.004 gal (15 ml)]

3.	Drive the vehicle up to 30 MPH and depress the brake up to stop for complete repeat more than 5 cycles.

4.	Clean the disc with water.

5.	Visually verify that rust is completely removed.

6.	If rust has not been removed, repeat the procedure above.

Front Brake Disc Thickness Check

1.	Check the brake pads for wear and fade.

2.	Check the brake disc for damage and cracks.

Remove all rust and contamination from the surface, and measure the disc thickness at 24 points, at least, at the same distance (10 mm, 0.4 in.) apart from the brake disc outer circle.

Front brake disc thickness

- For 17 inch wheel Standard : 30 mm (1.18 in)

- For 17 inch wheel Service limit : 28 mm (1.10 in)

DTV (Disc Thickness Variation) :

Circumference direction : Less than 0.005 mm (0.00020 in.)

Radial direction : Less than 0.010 mm (0.00040 in.)

Brake System — Brake System / Front Brake Disc / Repair procedures / Inspection illustration

if the measured DTV larger than the limit and thickness thicker than the service limit of the disc, skim the brake disc.

•	Skim the disc according to the method of using each skimming lathe. (On-car mounting or external device)

•	Do not skim the brake disc when it reaches the service limit.

5.	If the brake disc is thinner than the service limit, replace the brake disc.

Front Brake Disc Runout Check

Place a dial gauge about 10 mm (0.4 in.) from the outer circumference of the brake disc, and measure the runout of the disc.

Brake disc runout

Limit : 0.050 mm (0.0016 in.) or less (new one)

Brake System — Brake System / Front Brake Disc / Repair procedures / Inspection illustration

if the measured disc runout larger than the limit and thickness thicker than the service limit of the disc, skim the brake disc and measure the runout again.

•	Skim the disc according to the method of using each skimming lathe. (On-car mounting or external device)

•	Do not skim the brake disc when it reaches the service limit.

3.	If the runout of the brake disc still exceeds the limit specification, replace the disc, and then measure the runout again.

Installation

1.	Install in the reverse order of removal.

Use a SST (09581-11000) when installing the brake caliper assembly.

•	Carefully press it to avoid damaging the piston inlet.

•	Make sure not to let the piston interfere when assembling the caliper body to the carrier.

Brake System — Brake System / Front Brake Disc / Repair procedures / Installation illustration

3.	Check the brake oil leakage and pedal operating condition.

Front Brake Disc Components and Components Location

Components 1. Front Brake Caliper2. Front Brake Disc 3. Front Axle...

Rear Brake Caliper Components and Components Location

Components [EPB Apply] 1. EPB Actuator screw2. EPB Actuator3. Guide rod bolt4. Bleed screw5. Caliper body6. Guide rod pin7. G...

Kia Sorento: Front Brake Disc Repair procedures

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