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:
Brake Pad and Rotor Burnishing
Warning: Road test a vehicle under safe conditions and while obeying
all traffic laws. Do not attempt any maneuvers that could jeopardize vehicle
control. Failure to adhere to these precautions could lead to serious personal
injury and vehicle damage.
Burnishing the brake pads and br ...
Intake Manifold Removal (1.8L LUW and LWE)
Remove the 2 intake manifold brace bolts (2, 3).
Remove the intake manifold brace (1).
Remove the 7 intake manifold bolts (1).
Remove the intake manifold (2) and the 4 intake manifold gaskets.
...
Oil Pump Cleaning and Inspection
Remove the external rotor with the internal rotor.
Visually inspect the components.
Install the external and the internal rotors.
Inspect the axial clearance of the rotors in respect to the control unit
housing upper edge.
Specifications
Permissible measurement is 0.02?E.058 ...
0.0059