1997 Buick Century Owner's Manual - Page 289

Radiator Pressure Cap Turning the radiator pressure cap when the engine and radiator are hot can allow steam and scalding liquids to blow out and burn badly. you With the coolant recovery tank, will almost you never have to add coolant at the radiator. Never turn the radiator pressure cap even a little when the engine and radiator are hot. NOTICE: Your radiator capis a 15 psi (105 kPa) pressure-type cap and must tightly installed to be prevent coolantloss and possible engine damage from overheating.Be sure the arrows on the cap line up with the overflow tube the radiator on filler neck. When you replace your radiator pressure cap, an AC@ cap is recommended. -- -- Thermostat You can be burnedif you spill coolant on hot engine parts. Coolant contains ethylene glycol, and itwill burn if the engine parts are hot enough. Don't spill coolant onhot engine. a Engine coolant temperature is controlled by a thermostat in the engine coolant system. The thermostat stops the flow of coolant through the radiator until the coolant reaches a preset temperature. When you replace your thermostat, an AC@thermostat is recommended. 6-23