1997 Buick Riviera Owner's Manual - Page 248

A. Windshield Washer Fluid Reservoir B. Remote Positive Battery Terminal C. Radiator Pressure Cap . ,. D. Supercharged Engine Oil Dipstick E. Supercharged Oil Fill Cap F. Automatic Transaxle Fluid Dipstick G. Brake Master Cylinder The Powertrain Control Module (PCM), works with a vacuum control to regulate the increased pressure required during specific driving conditions. When this in&fia'sed pressure or boost not desired, such as during is air idling and light throttle cruising, the excessthat the supercharger is pumping is routed through a bypass. All of these controls working together provide high performance, character and efficiency in the fuel 3800 V6 Supercharged Buick engine. H. Supercharged Engine Coolant Recovery Tank I.AirCleaner Your vehicle may have a 3800 Supercharged engine. Buick chose supercharging rather than turbocharging because Buick emphasizes smooth, refined power. The supercharger is a device which is designed to pump more air into the engine than it would normally use. This air, mixed with fuel, creates increased engine power. Since the supercharger is a pump and is driven from an engine accessory drive belt, increased pressure is available at all driving conditions. Engine Oil If the CHECKOIL LEVEL light onthe instrument panel comes on, means it you need to check your engine oil level right away. CHEC K 0IL LEVEL For more mformation, see "Check Oil Level Light"in the Index.You should check your engine level oil regularly; this is an added reminder. 6-11