Skylark L4-138 2.3L DOHC VIN D MFI QUAD 4 (1989)
Tires: All Technical Service Bulletins
Wheels (Steel) - Proper Changing Procedure
Bulletin: 92-3-17
Date: July '92
Ref. No.: 92-241-3
Corp. Ref. No.: 233002
SUBJECT:
INFORMATION ON AVOIDING DAMAGE TO STEEL WHEELS FROM IMPROPER WHEEL/TIRE CHANGING TECHNIQUES
MODELS AFFECTED:
ALL 1983-92 MODELS
It is important to note that damage to either the tire mounting surface or the wheel mounting holes can result from the use of improper wheel attachment
or tire mounting techniques on vehicles with steel wheels.
1.
IMPROPER TIRE CHANGING TECHNIQUES:
It takes about 70 seconds for the air to completely exhaust from a large tire. If the technician doesn't wait this amount of time after removing the
valve core, the bead breaker on the tire changer could put enough force on the tire to bend the wheel at the mounting surface. Such damage can
result in vibration, shimmy, and under severe usage (i.e. police vehicle) lead to cracking.
2.
OVER TORQUING OF THE WHEEL NUTS:
The service specification for wheel nut torque is listed in the respective Service Manual. Some wheels have been observed with wheel nuts that
were over torqued by as much as 50 percent. This may damage the wheel mounting holes and may also lead to cracks.
I.
PROPER TIRE CHANGING TECHNIQUES:
Completely deflate the tire before attempting to break the tire bead loose.
MOUNTING SURFACE CHECKING PROCEDURE
