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:
Hydraulic Brake System Description and Operation
System Component Description
The hydraulic brake system consists of the following:
Hydraulic Brake Master Cylinder Reservoir
Contains a supply of brake fluid for the hydraulic brake system.
Hydraulic Brake Master Cylinder
Converts mechanical input force into hydr ...
Camshaft Cover Installation
Clean the sealing surfaces.
Note: The thickness of the sealing bead should be 2 mm (0.0787 in).
Apply sealing compound to areas (1) and (2). Refer to Adhesives, Fluids,
Lubricants, and Sealers.
Note: The installation procedure sho ...
Transmission Control Replacement
Removal Procedure
Remove the floor console. Refer to
Front Floor Console Replacement.
Lift both cable adjustment retainers (1), one for
each cable, to release the shift lever and selector lever cable.
.1
Pull the shift lever and selector lever cable ret ...
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