Front Brake: Inspection

WARNING: This page is about a different car, the 2014 Subaru BRZ. However, it is still accessible from the selected car via links, so may be relevant.

Disc brake piston and cylinder check
1. Check that there is no damage on the side of the disc brake piston and the cylinder wall.
Disc brake pad thickness check
Limit: 1.5mm {0.059in}

Reference value:: 11.0mm {0.433in} (New)

Fig 1: Checking Disc Brake Pad Thickness
Courtesy of SUBARU OF AMERICA, INC.
Front disc thickness check
Limit: 22.0mm {0.866in}

Reference value:: 24.0mm {0.945in} (New)

Fig 2: Checking Front Disc Thickness
Courtesy of SUBARU OF AMERICA, INC.
Disc runout check
1. Before checking the disc runout, check the hub & bearing ASSY's play and runout. (Refer to ON-VEHICLE INSPECTION )
2. Install the front disc to the axle hub and secure it with 5 hub nuts.
  Standard value: T=120N.m {1224kgf.cm} {88.5ft.lbf}
3. Using a dial gauge, check the runout 10 mm{0.394 in} inside of the disc outer periphery.
  Limit: 0.05mm {0.002in}
  
  Fig 3: Checking Disc Runout Using Dial Gauge
  Courtesy of SUBARU OF AMERICA, INC.
  CAUTION:
  - Do not bring the magnetized part of the dial gauge close to the axle hub or speed sensor.
  - Install the dial gauge to the shock absorber.
  - When the runout exceeds the limit, change the disc and axle positions to minimize the runout and install them. If the runout still exceeds the limit even after changing the positions, replace the disc with a new one.