2004 Chevrolet Corvette Owner's Manual - Page 312

Magnesium Wheels {CAUTION: Incorrect wheel nuts or improperly tightened wheel nuts can cause the wheel to become loose and even come off. This could lead to a crash. Be sure to use the correct wheel nuts. If you have to replace them, be sure to get new GM original equipment wheel nuts. Notice: Improperly tightened wheel nuts can lead to brake pulsation and rotor damage. To avoid expensive brake repairs, evenly tighten the wheel nuts in the proper sequence and to the proper torque specification. Notice: If your vehicle has magnesium wheels, moisture on or around the mounting surface of the magnesium wheel will cause corrosion and damage to the wheel. To help prevent this, a magnesium wheel uses two rubber O-rings. One goes on the inboard side of the wheel and the other on the back of the center hubcap. When you put a magnesium wheel back on, be sure the O-rings are correctly installed. On the inboard side, of the wheel, work the O-ring into the groove. When properly installed, this O-ring fits snugly. The other O-ring goes around the retaining legs of the center cap. Used Replacement Wheels {CAUTION: Putting a used wheel on your vehicle is dangerous. You can't know how it's been used or how far it's been driven. It could fail suddenly and cause a crash. If you have to replace a wheel, use a new GM original equipment wheel. 5-70