Corsica L4-121 2.0L (1988)
Wheels: All Technical Service Bulletins
Wheels (Steel) - Damage Due to Improper Mounting
Number:
92-232-3E
Section:
3E
Date:
JUNE 1992
Corporate Bulletin No.: 233002
ASE No.: A4
Subject:
AVOIDING DAMAGE TO STEEL WHEELS FROM IMPROPER WHEEL/TIRE CHANGING TECHNIQUES
Model and Year:
1983-92 ALL PASSENGER CARS AND TRUCKS WITH STEEL WHEELS
It is important to use proper procedures to prevent damage to either the tire mounting surface or the wheel mounting holes. Damage can result from the
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 change 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 nuts is listed in the Service Manuals. 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