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:
Remote Keyless Entry (RKE) System
The RKE transmitter may work up to 60m (195 ft) away from the vehicle.
The RKE transmitter can have one of the two symbols for the remote trunk release.
With Remote Start Shown
Press the key release button to extend the key blade. The key can be used for
the ignition and all locks.
Press ...
Replacement Bulbs
Exterior Lamp
Bulb Number
Back-Up Lamp
921
Front Fog Lamp
H8
Front Parking/Turn Signal Lamp
7444NA
High-Beam Headlamp
9005LL
...
Cylinder Head Assemble
Special Tools
EN-958 Valve Stem Seal Installer
EN-8062 Valve Spring Compressor
EN-8062-5 Adapter
EN-50717-2 Compressor Assembly of EN-50717 Kit
For equivalent regional tools, refer to Special Tools.
Lubricate the valve stem and the valve guide with clean engine oil.
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