Disc Brake Service Specifications

WARNING: This page is about a different car, the 2003 Pontiac Montana, 2003 Oldsmobile Silhouette, and 2003 Chevrolet Venture. However, it is still accessible from the selected car via links, so may be relevant.

DISC BRAKE SPECIFICATIONS

Application

In. (mm)

Front Brakes (AWD)

Rotor Diameter

Rotor Discard Thickness ⁽¹⁾

1.063 (27.0)

Rotor Maximum Assembled Lateral Runout

0.002 (0.06)

Rotor Maximum Allowable Scoring

0.059 (1.50)

Rotor Maximum Allowable Thickness Variation

0.001 (0.025)

Rotor Minimum Allowable Thickness After Refinish

1.18 (28.4)

Rotor Thickness (NEW)

1.181 (30.0)

Front Brakes (FWD)

Rotor Diameter

10.945 (278)

Rotor Discard Thickness ⁽¹⁾

1.21 (30.7)

Rotor Maximum Lateral Runout

.002 (.06)

Rotor Maximum Scoring

.059 (1.50)

Rotor Maximum Thickness Variation

.001 (.025)

Rotor Minimum Thickness After Refinish

1.22 (31.08)

Rotor Thickness (NEW)

1.27 (32.2)

Rear Brakes

Rotor Diameter

10.945 (278)

Rotor Discard Thickness ⁽¹⁾

.35 (9.0)

Rotor Maximum Lateral Runout

.002 (.06)

Rotor Maximum Scoring

.059 (1.50)

Rotor Maximum Thickness Variation

.001 (.025)

Rotor Minimum Thickness After Refinish

10.0 (0.39)

Rotor Thickness (NEW)

.43 (11.0)

⁽¹⁾	All brake rotors have a discard dimension cast into them. Replace any rotor that does not meet this specification. After refinishing the rotor, replace any rotor that does not meet the minimum thickness after refinish specifications.

DRUM BRAKE SPECIFICATIONS

Application	In. (mm)
Brake Drum Discard Diameter	8.920 (226.57)
Brake Drum Inside Diameter (NEW)	8.863 (225.12)
Brake Drum Maximum Diameter After Refinish	8.909 (226.30)
Brake Drum Maximum Allowable Radial Runout	.006 (.15)
Brake Drum Maximum Allowable Scoring	.06 (1.5)
Wheel Cylinder Bore Diameter	.874 (22.20)