Chevrolet Sonic Repair Manual: Brake Rotor Assembled Lateral Runout Correction
Note:
- Brake rotor thickness variation MUST be checked BEFORE checking for assembled lateral runout (LRO). Thickness variation exceeding the maximum acceptable level can cause brake pulsation. Refer to Brake Rotor Thickness Variation Measurement.
- Brake rotor assembled lateral runout (LRO) exceeding the maximum allowable specification can cause thickness variation to develop in the brake rotor over time, usually between 4,800–11,300 km (3,000–7,000 mi). Refer to Brake Rotor Assembled Lateral Runout Measurement.
Review the following acceptable methods for bringing the brake disc assembled LRO to within specifications. Determine which method to use for the vehicle being repaired.
- The indexing method of correcting assembled LRO is most effective when the LRO specification is only exceeded by a relatively small amount: 0.025–0.127 mm (0.001–0.005 in). Indexing is used to achieve the best possible match of high spots to low spots between related components. Refer to Brake Rotor Assembled Lateral Runout Correction - Indexing.
- The on-vehicle brake lathe method is used to bring the LRO to within specifications through compensating for LRO while refinishing the brake rotor. Refer to Brake Rotor Assembled Lateral Runout Correction - On Vehicle Lathe.
If the assembled LRO cannot be corrected using these methods, then other components must be suspected as causing and/or contributing to the LRO concern.
Brake Rotors
...
Brake Rotor Assembled Lateral Runout Correction - Indexing
Special Tools
CH-45101-100 Conical Brake Rotor Washers
For equivalent regional tools, refer to Special Tools.
Warning: Refer to Brake Dust Warning.
Note:
Brake ro ...
Other materials:
Trunk Release
To lock or unlock the trunk from the inside, press
or
on the central locking switch or on
the driver door switch.
To open the trunk from inside the vehicle press
.
To lock the trunk from the outside press
on the RKE transmitter.
To open the trunk from outside of the vehicle:
Pres ...
Radio Controls with Touchscreen
Audio Source Menu
VOL
(Volume): Press to increase or decrease
the volume.
(Power): Press and hold to turn the
system on and off.
(Home Page): Press to enter the Home
Page. ...
Hydraulic Valve Lash Adjuster Arm Replacement
Hydraulic Valve Lash Adjuster Arm Replacement
Callout
Component Name
Preliminary Procedures
Remove the intake camshaft. Refer to Intake Camshaft Replacement.
Remove the exhaust camshaft. Refer to Exhaust Camshaft Replaceme ...
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