1996 Buick Century Owner's Manual - Page 230

rhacking Coc'mt ! * clding Coolant If you need more coolant, add the proper mix at the coolant recovery tank. If the coolant recovery tank is completely empty, add coolant tothe radiator. (See "Engine Overheating" in the Index.) IThrning the radiator pressure cap when the engine and radiatorare hot can allow steam and scalding liquids to blow out and burn you badly. With the coolant recovery tank, you will almost never have to add coolant at the radiator. Never turn the radiator pressure cap even a little when the engine and radiator are hot. The coolant recovery tank is located on the passenger's side of the enginecompartment. When your engine is cold, the coolant level should be at ADD or a little higher. When your engine iswarm, the level should be up to FULL HOT ora little higher. -- -- .