Chevrolet Sonic Repair Manual: Tire and Wheel Balancing (Road Force Variation (RFV))
- ALL wheel/tire assemblies must have a RFV within spec before being mounted on vehicle.
- RFV is unrelated to tire balance.
- RFV is identifying the stiff portion of the tire and determining if it is within spec.
- If RFV is too high, it will result in a vibration condition.
- Do not attempt to measure RFV on tires that have temporary flat spots. If necessary, drive the vehicle to relieve the flat spots.
- Prior to measuring for RFV, the tires must be inflated to the specification on the label.
- Passenger Cars (including Crossover Vehicles) = 18 lbs.
- Truck Tires: (P) - metric = 24 lbs.
(LT) - metric = 35 lbs.
- It is recommended that RFV measurements are made prior to installation of balance weights. Once adequate road force levels have been achieved, move on to balance the assembly.
Important:
If a wheel/tire assembly is not within the RFV specification after match mounting, the tire must be returned to the tire manufacturer. DO NOT install tire/wheel assembly on a vehicle if it exceeds the RFV specification.
Tire and Wheel Balancing (Collet Cone Selection)
Important: Never use the hub cap bore to center the wheel onto
the balancer. The pilot bore (on the hub side of the wheel) is machined
to be concentric to very tight non - standard tole ...
Tire and Wheel Balancing (Wheel Pilot Bore Greasing)
Beginning with MY 2011 vehicle, pilot bore grease should be applied.
To enable this, grease must be applied to the pilot bore to prevent the
wheel from seizing onto the hub.
Refer to Adhesi ...
Other materials:
Fuel Gauge
The fuel gauge indicates about how much fuel is left when the ignition is turned
to ON/RUN.
When the tank nears empty, the low fuel warning light will come on. There is
still a little fuel left, but the vehicle's fuel tank should be filled soon. See
Low Fuel Warning Light for more ...
Rear Seat Center Shoulder Belt Replacement (Hatchback)
Rear Seat Center Shoulder Belt Replacement
Callout
Component Name
Preliminary Procedures
Remove the rear seat cushion. Refer to Rear Seat Cushion Removal
and Installation.
Remove the rear seat back cushion. Refer to Rear ...
Caster Description
Caster is the tilting of the uppermost point of the steering axis either forward
or backward, when viewed from the side of the vehicle. A backward tilt is positive (+)
and a forward tilt is negative (−). Caster influences directional control of the
steering but does not a ...
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