Chevrolet Sonic Repair Manual: Tire-to-Wheel Match-Mounting (Vectoring)
Note:
After remounting a tire to a wheel or after replacing a tire
and/or a wheel, remeasure the tire and wheel assembly runout in order to verify
that the amount of runout has been reduced and brought to within tolerances.
Ensure that the tire and wheel assembly is properly balanced before reinstalling
to the vehicle.
- Mark the location of the high spot (3) on the tire as determined during
the off-vehicle tire and wheel assembly runout measurement.
- Place a reference mark (2) on the tire sidewall at the location of the valve
stem (5).
- Always refer to the valve stem as the 12 o'clock position.
- Refer to the location of the high spot (3) by its clock position on the
wheel, relative to the valve stem.
Mount the tire and wheel assembly on a tire machine and break down the bead.
Do not dismount the tire from the wheel at this time.
Rotate the tire 180 degrees on the rim so that the valve stem reference mark (8)
is now at the 6 o'clock position in relation to the valve stem (6). You may need
to lubricate the bead in order to easily rotate the tire on the wheel.
Reinflate the tire and seat the bead properly.
Mount the assembly on the tire balancer and remeasure the runout. Mark the new
location of the assembly runout high spot on the tire.
If the assembly runout has been reduced and is within tolerance, no further
steps are necessary. Balance the tire and wheel assembly, then install the assembly
to the vehicle. Refer to the following:
- Tire and Wheel Assembly Balancing - Off Vehicle
- Tire and Wheel Removal and Installation
If the clock location of the high spot remained at or near the original clock
location of the high spot (7) and the assembly runout has NOT been reduced, the
wheel is the major contributor to the assembly runout concern.
If the clock location of the high spot has moved, however the assembly runout
has NOT been reduced, perform the following steps:
- If the clock location of the high spot (7) is now at or near a position
180 degrees from the original clock location of the high spot, the tire is the
major contributor to the assembly runout concern.
- If the clock location of the high spot is now in-between the 2 extremes,
then both the tire and the wheel are both contributing to the assembly runout
concern. Rotate the tire an additional 90 degrees in both the clockwise and
the counterclockwise directions to obtain the lowest amount of assembly runout.
Special Tools
CH-41013 Rotor Resurfacing Kit
CH-42450-A Wheel Hub Resurfacing Kit
For equivalent regional tools, refer to Special Tools.
Removal Procedure
Ra ...
There are two types of tire and wheel balancing: static and dynamic.
Static balance is the equal distribution of weight around the wheel. Assemblies
that are statically unbalanced cause a bouncing ...
Other materials:
Steering Gear Boot Replacement
Special Tools
CH-804 Tensioner
For equivalent regional tools, refer to Special Tools.
Removal Procedure
Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle.
Remove the steering linkage outer tie rod. Refer to Steering Linkage
Outer Tie Rod Rep ...
Brake Pressure Modulator Valve Replacement
Removal Procedure
Warning: Refer to Brake Fluid Irritant Warning.
Caution: Refer to Brake Fluid Effects on Paint and Electrical
Components Caution.
Caution: Always connect or disconnect the wiring harness connector
from the EBCM/EBTCM with the ignition switch ...
Throttle Body Assembly Replacement
Removal Procedure
Disconnect the throttle body wiring harness connector.
Remove the charge air cooler outlet air hose from
the throttle body. Refer to Charge Air Cooler Outlet
Air Hose Replacement.
Remove the 4 throttle body fasteners (3).
Remo ...
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