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HOMESERVICE MANUALSCHEVROLET2008HHR LT, 2.4 P, AUTOMATICREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 163 (CONVENTIONAL BRAKE COMPONENTS)CONVENTIONAL BRAKE COMPONENTSFRONT BRAKE DISC INSPECTIONTHICKNESS AND PARALLELISM
2008 Chevrolet HHR LT, 2.4 P, Automatic

Thickness and Parallelism

2008 Chevrolet HHR LT, 2.4 P, AutomaticSECTION Thickness and Parallelism
WARNING: This page is about a different car, the 2011 Honda Insight and 2010 Honda Insight. However, it is still accessible from the selected car via links, so may be relevant.
  1. Raise the vehicle on a lift (see LIFT AND SUPPORT POINTS ).
  2. Remove the front wheels.
  3. Remove the brake pads (see REPLACEMENT  ).
  4. Using a micrometer, measure the brake disc thickness at eight points, about 45 ° apart and 10 mm (3/8 in) in from the outer edge of the brake disc. Replace the brake disc if the smallest measurement is less than the max. refinishing limit.

    Brake disc thickness: 

    Standard: 21.0 mm (0.83 in) 

    Max. refinishing limit: 19.0 mm (0.75 in) 

    Brake disc parallelism: 0.015 mm (0.0006 in) max. 

    NOTE: This is the maximum allowable difference between the thickness measurements.
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.