1998 Buick Riviera Owner's Manual

When to CheckCheck your tires once a month or more.Don’t forget your compact spare tire. It should be at60 psi (420 kPa).How to CheckUse a good quality pocket-type gage to check tirepressure. You can’t tell if your tires are properly inflatedsimply by looking at them. Radial tires may lookproperly inflated even when they’re underinflated.Be sure to the put valve caps back on the valve stems. They When rotating your tires, always use the correcthelp prevent leaks by keeping out dirt and moisture. rotation pattern shown here.Tire Inspection and RotationTires should be rotated every 6,000 to 8,000 miles(10 000 to 13 000 km). Any time you notice unusualwear, rotate your tires as soon as possible and checkwheel alignment. Also check for damaged tires or wheels.See “When It’s Time for New Tires” and “WheelReplacement” later in this section for more information.The purpose of regular rotation is to achieve moreuniform wear for all tires on the vehicle. The firstrotation is the most important. See “ScheduledMaintenance Services” in the Index for scheduledrotation intervals.Don’t include the compact spare tire in yourtire rotation.After the tires have been rotated, adjust the frontand rear inflation pressures as shown on theTire-Loading Information label. Make certain thatall wheel nuts are properly tightened. See “WheelNut Torque” in the Index.