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NHTSA Engineering Analysis EA08022

Engineering Analysis · TIRE VALVE OZONE CRACKING · Opened 2008-09-23 · Closed 2008-12-12

Investigation

Action number
EA08022
Type
Engineering Analysis
Open date
2008-09-23
Close date
2008-12-12
Manufacturer
DILL AIR CONTROLS PRODUCTS
Affected makes
DILL-ACP
Affected components
TIRES:VALVE
Affected model years
9999
Affected (make, year) variants
3

Summary

BY LETTER DATED DECEMBER 5, 2008, DILL SUBMITTED A REPORT TO ODI IDENTIFYING A DEFECT RELATED TO OZONE CRACKING IN TWO PRODUCTION LOTS OF TIRE VALVE STEMS THAT WERE MANUFACTURED IN CHINA BY TOPSEAL AUTO-PARTSIN JULY 2006 (NHTSA SAFETY RECALL NO. 08T-028).ACCORDING TO DILL, APPROXIMATELY 1,800,000 VALVES WERE DISTRIBUTED AND SOLD IN THE UNITED STATES FROM THE SUBJECT LOTS.DILL ESTIMATES THAT ABOUT 200,000 OF THESE VALVES MAY BE PRONE TO OZONE CRACKING RESULTING IN TIRE AIR LOSS DURING THEIR EXPECTED SERVICE LIFE.TIRE VALVE FAILURE COULD RESULT IN SUDDEN LOSS OF VEHICLE CONTROL AND POSSIBLY A CRASH. DILL BASED THIS RANGE ON ITS ANALYSIS OF CLAIM DATA, WHICH SHOWED THAT THE VAST MAJORITY OF VALVES RETURNED FROM THE FIELD WITH CRACKS SEVERE ENOUGH TO HAVE LEAKED AIR WERE INSTALLED FROM NOVEMBER 2006 THROUGH JULY 2007.FOLLOWING A FREE INSPECTION,DILL VALVES THAT ARE CRACKED WILL BE REPLACED UNDER THE RECALL FREE OF CHARGE.DILL HAS ISSUED A PRESS RELEASE PROVIDING INFORMATION ABOUT THE RECALL AND HAS POSTED INFORMATION FOR CONSUMERS ON THE INTERNET AT WWW.TIREVALVERECALL.NET.EA08-022 WAS OPENED BY ODI ON SEPTEMBER 23, 2008, TO INVESTIGATE APPROXIMATELY 23,450,000 VALVES MANUFACTURED BY TOPSEAL FROM JULY 2006 TO NOVEMBER 15, 2006.DURING THIS PERIOD, TOPSEAL CHANGED ITS SUPPLIER OF THE VALVE RUBBER COMPOUND USED FOR OZONE PROTECTION .IN A MAY 2, 2008 CUSTOMER ADVISORY LETTER TO COMPANIES THAT PURCHASED THE SUSPECT VALVES, DILL DESCRIBED THE SCOPE OF THE POTENTIAL PROBLEM AND INDICATED THAT IT MAY AFFECT VALVES SHIPPED BY DILL FROM LATE-AUGUST 2006 THROUGH MID-FEBRUARY 2007.DILL ALSO REQUESTED THAT ITS CUSTOMERS:(1) INSPECT ALL UNUSED INVENTORY AND RETURN ALL BOXES WITH LOT NUMBERS FROM 2006; (2) INSPECT THE VALVE STEMS ON ALL VEHICLES THAT RECEIVED VALVE STEMS IN THE PERIOD FROM SEPTEMBER 2006 THROUGH JUNE 2007, AND (3)REPLACE ANY VALVES WITH VISIBLE SURFACE CRACKS.SAMPLES OF UNUSED VALVES RETURNED TO DILL IN RESPONSE TO THIS ADVISORY WERE SELECTED FROM EACH PRODUCTION LOT.

Source

Authoritative
NHTSA ODI investigation page
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