1998 Buick Riviera Owner's Manual

Adding only plain water to your cooling systemcan be dangerous. Plain water, or some otherliquid like alcohol, can boil before the propercoolant ‘mixture will. Your vehicle’s coolantwarning system is set for the proper coolantmixture. With plain water or the wrong mixture,your engine could get too hot but you wouldn’tget the overheat warning. Your engine couldcatch fire and you or others could be burned.Use a 50/50 mixture of clean water andDEX-COOL@ coolant.I NOTICE:In cold weather, water can freeze and crack theengine, radiator, heater core and other parts.Use the recommended coolant and the propercoolant mixture.You can be burned if you spill coolant on hotengine parts. Coolant contains ethylene glycoland it will burn if the engine parts are hotenough. Don’t spill coolant on a hot engine.When the coolant in the coolant recovery tank is atFULL COLD, start your vehicle.5-17