1998 Buick Riviera Owner's Manual - Page 282

When to Check Check your tires once a month or more. Don't forget your compact spare tire.should be at It 60 psi (420 kPa). How to Check Use a good quality pocket-type gage to check tire pressure. You can't tellif your tires are properly inflated simply by looking at them. Radial tires may look properly inflated even when they're underinflated. Be sure to the valve caps back on the valve stems. They rotating your tires, always use correct put When the help prevent leaks by keeping outdirt and moisture. rotation pattern shown here. Don't include the compact spare tireyour in Tire Inspection and Rotation tire rotation. Tires should be rotated every6,000 to 8,000 miles After the tires have been rotated, adjust thefront (10 000 to 13 000 km). Any time you notice unusual and rear inflation pressures as shown on the wear, rotate your tires soon as possible and check as Tire-Loading Information label. Make certain that wheel alignment.Also check for damaged tires or wheels. all wheel nuts are properly tightened. See "Wheel See "When It's Time for New Tires" and "Wheel Nut Torque" in the Index. Replacement" laterin this section for more information. The purpose of regular rotation is to achieve more uniform wear for all tireson the vehicle. The first rotation is the most important.See "Scheduled Maintenance Services" in the Index for scheduled rotation intervals.