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:
Relay Replacement (Within an Electrical Center)
Special Tools
EL-43244 Relay Puller Pliers
Removal Procedure
Remove the electrical center cover.
Note:
Always note the orientation of the relay.
If equipped with a notch style relay; observe the location of
the notch on the old relay to verify the new r ...
Odor Correction
Eliminating Air Conditioning Odor
Odors may be emitted from the air conditioning system primarily at start
up in hot, humid climates. The following conditions may cause the odor:
Debris is present in the HVAC module.
Microbial growth on the evaporator core
When the blower ...
Front Wheel Drive Shaft Inner Joint and Boot Replacement
Special Tools
DT-35910 Drive Axle Boot Clamp Pliers
For equivalent regional tools, refer to Special Tools.
Disassemble Procedure
Note: There are types of inner joints available. If the inner
joint is connected with the CV style joint, the inner joint is not serviced
separa ...
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