Chevrolet Sonic Repair Manual: Tire and Wheel Balancing (Collet Cone Selection)
- Accurate machine mounting is critical for achieving accurate RFV readings and proper balance.
- Flange plate mounting MUST be used for plastic clad wheels. Select the flange plate with the correct pins and set the pins to the correct hold circle.
- Mounting surface of the wheel must be clean and free of dirt, corrosion, burrs, paint, etc.
- A centering check must be performed any time a new wheel / collet configuration is set - up on the machine.
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 tolerances. The bottom cap bore is not machined to this same degree of precision.
Hunter Equipment: Collet Selection
Select the appropriate collet. If using a Hunter Equipment with GM software, it will provide the color collet which should be used.
Other Tire Mounting Equipment: Cone Selection- Hunter's collets will work on other manufacturer's equipment – at least on ones with the same shaft diameter. These should be used if at all possible. Other manufacturers may also be producing similar collets.
- GM Wheels are designed for back coning ONLY. Use the size cone that contacts the center bore of the wheel nearest the center of the cone. Be sure the cone does not bottom out.
- A cone should be used to achieve the best centering on the machine.
- If the best fit cone sits deep within the center bore, this can reduce the center spring's push against the center cone and compromise centering. When this occurs, position the spacer washer between the pressure spring and the cone.
Tire and Wheel Balancing (Balancing/Wheel Weights)
Use 3M wheel weights, refer to Adhesives, Fluids, Lubricants, and Sealers
for application.
Surface of the wheel must be clean and dry.
All tire and wheel assemblies are to be checked for st ...
Tire and Wheel Balancing (Road Force Variation (RFV))
ALL wheel/tire assemblies must have a RFV within spec before being mounted
on vehicle.
Important: If a wheel/tire assembly is not within the RFV specification
after match mounting, th ...
Other materials:
Tire Pressure Monitor Operation
This vehicle may have a Tire Pressure Monitor System (TPMS). The TPMS is designed
to warn the driver when a low tire pressure condition exists. TPMS sensors are mounted
onto each tire and wheel assembly, excluding the spare tire and wheel assembly.
The TPMS sensors monitor the air pressure in ...
Timing Belt Replacement
Special Tools
EN-6333 Timing Belt Tensioner Locking Pin
EN-6340 Camshaft Locking Tool
For equivalent regional tools, refer to Special Tools.
Removal Procedure
Note: If the timing belt is being replaced due to the maintenance
schedule interval, then the timing belt t ...
Manual Transmission Shift Lever and Selector Lever Cable Adjustment
Remove the floor console. Refer to
Front Floor Console Replacement.
Lift upward and disengage (do not remove) both cable lock
adjusters (1) to release the internal cable assembly, one for each side.
Block the shift control housing, push the selector lever ( ...
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