1993 Buick Regal Owner's Manual - Page 231

NOTICE: If you use an improper coolant mix, your engine could overheat and be badly damaged.The your repair cost wouldn't be covered by warranty. Too much water in the mix can freeze core and and crack the enqine, radiator, heater other parts. __./" t I Adding Coolant The 3.8 liter engine has the coolant recovery tank located at the left of the engine compartment. To Check Coolant: When your engine is cold, the coolant level should be at "COLD" or a little higher. When your engine is warm, the level should be up to "HOT," or a little higher. The 3.1 liter engine has the coolant recovery tank located at the left of the engine Compartment. 229