ION L4-2.2L VIN F (2004)
Alignment: Customer Interest
Alignment - Premature/Irregular Tire Wear
Bulletin No.: 05-03-07-001B
Date: July 27, 2005
TECHNICAL
Subject:
Premature and/or Irregular Tire Wear (Set Front Sum Toe and Rotate Tires as Necessary)
Models:
2003-2006 Saturn ION Vehicles
Attention:
Fixed Operations Manager and Technician
Supercede:
This bulletin is being revised to add a model year and delete an Important statement regarding tire returns. Please discard Corporate Bulletin Number
05-03-07-001A (Section 03 - Suspension).
Condition
Some customers may comment on premature and/or irregular tire wear on the inside edge of the tire.
Cause
This condition may be caused by a negative front total toe (sum toe) that is outside of wheel alignment specifications.
Correction
Verify the concern and adjust the front total toe as necessary to the new preferred setting of (+ 0320° +/- 0.20°) for tire wear issues. Refer to the service
procedure in this bulletin.
Service Procedure
1.
Check all tire pressure readings and record this information on the repair order.
2.
Inspect all four tires for any premature, irregular or excessive tire wear.
^
If the inside edge of the tire is worn to the wear indicators, replace the affected tire(s) and continue with the next step.
^
If the inside edge of the tire is not worn to the wear indicators, rotate the tires and continue with the next step.
3.
Set the tire inflation pressure per the vehicle tire placard on the driver's door.
4.
Inspect the fuel level. The fuel tank should be full or the vehicle should have compensating load added.
Important:
A printout from the alignment machine of "before" and "after" specifications must be attached to the hardcopy of the CSO.
5.
Measure the front and rear alignment angles and record the readings.
Important:
When performing adjustments to vehicles requiring a 4-wheel alignment, set the rear wheel alignment angles first in order to obtain proper
front alignment angles.
Important:
The service equipment used to measure wheel alignment may or may not contain the correct alignment specifications for Saturn ION vehicles.
6.
If any alignment angle is outside of specification, then adjust the angle or angles until they are within vehicle specifications.
7.
Adjust front total toe to the new preferred setting (+ 0.20° +/- 0.20°) for tire wear issues.
8.
Road test the vehicle in order to verify the steering wheel is straight.
