1998 Buick Riviera Owner's Manual

INOTICE:When adding coolant, is it important that youuse only DEX-COOL@ (silicate-free) coolant.I€ coolant other than DEX-COOL is added tothe system, premature engine, heater core orradiator corrosion may result. In addition, theengine coolant will require change sooner -- at30,000 miles (50 000 km) or 24 months,whichever occurs first. Damage caused by theuse of coolant other than DEX-COOL@ is notcovered by your new vehicle warranty.What to UseUse a mixture of one-half clean water (preferablydistilled) and one-half DEX-COOL’ coolant whichwon’t damage aluminum parts. If you use this mixture,you don’t need to add anything else.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.6-21