Front Brake

Front Brake Disc Thickness Check 

1. Check the brake pads for wear and fade.
2. Check the brake disc for damage and cracks.
3. Remove all rust and contamination from the surface, and measure the disc thickness at 8 points, at least, of same distance (5mm) from the brake disc outer circle.

   Front brake disc thickness 

   Standard: 23 mm (0.906 in)

   Service Limit: 21 mm (0.827 in)

   Deviation: Less than 0.005 mm (0.0002 in)

   Fig 1: Checking Front Brake Disc

   Courtesy of KIA MOTORS AMERICA, INC.
4. If wear exceeds the limit, replace the discs and pad assembly left and right of the vehicle.

Front Brake Pad Check 

1. Check the pad wear. Measure the pad thickness and replace it, if it is less than the specified value.

   Pad thickness 

   Standard value: 10.5 mm (0.413 in)

   Service limit: 2.0 mm (0.0787 in)

   Fig 2: Identifying Front Brake Pad

   Courtesy of KIA MOTORS AMERICA, INC.
2. Check that grease is applied, to sliding contact points and the pad and backing metal for damage.

Front Brake Disc Runout Check 

1. Place a dial gauge about 5mm (0.2 in.) from the outer circumference of the brake disc, and measure the runout of the disc.

   Brake disc runout 

   Limit: 0.04 mm (0.0016 in.) or less (new one)

   Fig 3: Checking Front Brake Disc Runout Using Dial Gauge

   Courtesy of KIA MOTORS AMERICA, INC.
2. If the runout of the brake disc exceeds the limit specification, replace the disc, and then measure the runout again.
3. If the runout does not exceed the limit specification, install the brake disc after turning it 180° and then check the runout of the brake disc again.
4. If the runout cannot be corrected by changing the position of the brake disc, replace the brake disc.