Rear Brake: Inspection

Disc brake piston and cylinder check
1. Check that there is no damage on the side of the disc brake piston and on the disc brake cylinder wall.

Disc brake pad thickness check

Normal type
Limit: 1.5mm{0.059in}

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

Brembo type

Limit: 1.55 mm {0.061 in}

Reference value: 9.0mm{0.354in}

Courtesy of SUBARU OF AMERICA, INC.

Disc thickness check

Normal type
Limit: 16.0 mm {0.630 in}

Reference value: 18.0mm {0.709in} (New)

Brembo type

Limit: 18.0 mm {0.709 in}

Reference value: 20.0mm {0.787in}

Courtesy of SUBARU OF AMERICA, INC.

Disc runout check

Before checking the rear disc runout, check the rear axle hub bearing play (Refer to ON-VEHICLE INSPECTION ) and runout (Refer to ON-VEHICLE INSPECTION ).
Secure the rear disc with 5 hub nuts.
Standard value: T=120N.m {1224kg.cm} {88.5ft.lbf}

Using a dial gauge, set at 10 mm {0.394 in} inside from the rear disc outer periphery to check the front side runout.

Courtesy of SUBARU OF AMERICA, INC.

Normal type
Limit: 0.05mm{0.002in}
Brembo type
Limit: 0.07 mm {0.003 in}

CAUTION: When the runout exceeds the limit, change the positions of the rear disc and rear axle hub to minimize the runout before installation. If the runout still exceeds the limit even after changing the rear disc and the rear axle hub positions, replace the rear disc with new one.

Set the dial gauge at 10 mm {0.39 in} inside from the disc rotor outer periphery, and rotate the disc rotor to check the back side runout.

Courtesy of SUBARU OF AMERICA, INC.

Normal type
Limit: 0.05mm{0.002in}
Brembo type
Limit: 0.07 mm {0.003 in}

NOTE: <Example of magnet stand and dial gauge installation>