Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSCHEVROLET2010HHR L4-2.4LREPAIR AND DIAGNOSISBRAKES AND TRACTION CONTROLDISC BRAKE SYSTEMBRAKE ROTOR/DISCSPECIFICATIONS
2010 Chevrolet HHR L4-2.4L
Brake Rotor/Disc: Specifications
2010 Chevrolet HHR L4-2.4LSECTION Specifications
FRONT BRAKE ROTOR/DISC
Front Brakes (RPO code JM4 - Power, Front Disc, Rear Drum, Cast Iron, Antilock, Front and Rear Wheel)
MINIMUM & DISCARD THICKNESS
Brake Rotor Discard Thickness* 22.8 mm (0.898 in)
Brake Rotor Minimum Allowable Thickness After Refinish 23.0 mm (0.906 in)
THICKNESS VARIATION/RUNOUT
Brake Rotor Maximum Allowable Assembled Lateral Runout 0.06 mm (0.002 in)
Brake Rotor Maximum Allowable Thickness Variation 0.025 mm (0.001 in)
Front Brakes (RPO code JL9 - Power, Front and Rear Disc, Antilock, Front and Rear Wheel)
MINIMUM & DISCARD THICKNESS
Brake Rotor Discard Thickness* 22.8 mm (0.898 in)
Brake Rotor Minimum Allowable Thickness After Refinish 23.0 mm (0.906 in)
THICKNESS VARIATION/RUNOUT
Brake Rotor Maximum Allowable Assembled Lateral Runout 0.06 mm (0.002 in)
Brake Rotor Maximum Allowable Thickness Variation 0.025 mm (0.001 in)
REAR BRAKE ROTOR/DISC
Rear Brakes (RPO code JL9 - Power, Front and Rear Disc, Antilock, Front and Rear Wheel)
MINIMUM & DISCARD THICKNESS
Brake Rotor Discard Thickness* 11.8 mm (0.465 in)
Brake Rotor Minimum Allowable Thickness After Refinish 12.0 mm (0.472 in)
THICKNESS VARIATION/RUNOUT
Brake Rotor Maximum Allowable Assembled Lateral Runout 0.06 mm (0.002 in)
Brake Rotor Maximum Allowable Thickness Variation 0.025 mm (0.001 in)
* 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 specification.
RENDER: 1.0x
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.