1997 Buick Regal Owner's Manual - Page 301

. 7.5,I , Radiator Pressure Cap I'urning the radiatorpressure capwhen the engine and radiatorare hot canallow steam and scalding liquids to blow out and burn you badly. With the coolant recovery tank, you will almost never have toadd coolant at the radiator. Never turn the radiator pressure cap even a hot. little when the engine and radiator are -- -- Your radiator cap is a 15 psi (105 kPa) pressure-type cap and must tightly installed be to preventcoolant loss and possible engine damage fromoverheating. Be sure the arrows on the cap line with the overflow tube on the up radiator filler neck. When you replace your radiator pressure cap, an AC@ cap is recommended. ... Thermostat You can be burned if you spill coolant on hot engine parts. Coolant contains ethylene glycol, and itwill burn if the engine parts arehot enough. Don't spill coolant on a hotengine. _ c Engine coolant temperature is controlled a thermostat by in the engine coolant system.The thermostat stops the flow of coolant throughthe radiator until the coolant reaches a preset temperature. When you replace your thermostat, an AC@thermostat is recommended.