Corvette V8-6.2L (2008)
Wheels: All Technical Service Bulletins
Tires/Wheels - Tire Slowly Goes Flat/Warning Light ON
TECHNICAL
Bulletin No.: 08-03-10-006C
Date: April 27, 2010
Subject: Tire Slowly Goes Flat, Tire Air Loss, Low Tire Pressure Warning Light Illuminated, Aluminum Wheel Bead Seat Corrosion (Clean and
Resurface Wheel Bead Seat)
Models:
2000-2011 GM Passenger Cars and Light Duty Trucks (including Saturn)
2003-2009 HUMMER H2
2006-2010 HUMMER H3
2005-2009 Saab 9-7X
Supercede:
This bulletin is being revised to update the model years. Please discard Corporate Bulletin Number 08-03-10-006B (Section 03 - Suspension).
Condition
Some customers may comment on a tire that slowly loses air pressure over a period of days or weeks.
Cause
Abrasive elements in the environment may intrude between the tire and wheel at the bead seat. There is always some relative motion between the tire and
wheel (when the vehicle is driven) and this motion may cause the abrasive particles to wear the wheel and tire materials. As the wear continues, there
may also be intrusion at the tire/wheel interface by corrosive media from the environment. Eventually a path for air develops and a 'slow' leak may ensue.
This corrosion may appear on the inboard or outboard bead seating surface of the wheel. This corrosion will not be visible until the tire is dismounted
from the wheel.
Notice
This bulletin specifically addresses issues related to wheel bead seat corrosion that may result in an air leak. For issues related to porosity of the wheel
casting that may result in an air leak, please refer to Corporate Bulletin Number 05-03-10-006F - Low Tire Pressure, Leaking Cast Aluminum Wheels
(Repair with Adhesive Sealant)
Correction
In most cases, this type of air loss can be corrected by following the procedure below.
Important
DO NOT replace a wheel for slow air loss unless you have evaluated and/or tried to repair the wheel with the procedure below.
Notice
The repair is no longer advised or applicable for chromed aluminum wheels.
1. Remove the wheel and tire assembly for diagnosis. Refer to Tire and Wheel Removal and Installation in SI.
2. After a water dunk tank leak test, if you determine the source of the air leak to be around the bead seat of the wheel, dismount the tire to examine
the bead seat. Shown below is a typical area of bead seat corrosion.Typical Location of Bead Seat Corrosion
