2008 Saturn Astra Owner's Manual - Page 254

9-64 Vehicle Service and Care { CAUTION Rust or dirt on a wheel, or on the parts to which it is fastened, can make wheel bolts become loose after time. The wheel could come off and cause an accident. When you change a wheel, remove any rust or dirt from places where the wheel attaches to the vehicle. In an emergency, you can use a cloth or a paper towel to do this; but be sure to use a scraper or wire brush later, if needed, to get all the rust or dirt off. See Changing a Flat Tire on page 9-60. 6. Raise the vehicle by turning the jack handle clockwise. Raise the vehicle far enough off the ground so there is enough room for the compact spare tire to fit under the vehicle. 7. Remove all of the wheel bolts. 8. Remove any rust or dirt from the wheel bolts, mounting surfaces and spare wheel. Installing wheels with a good metal-to-metal contact at the mounting surface is necessary to prevent the wheel bolts from becoming loose. To prevent corrosion or rust build-up, apply a light coat of wheel bearing grease to the wheel hub center and to the cone-shaped surface of each wheel bolt at every wheel change.