1993 Oldsmobile Silhouette Owner's Manual - Page 202

Problems on the Road Engine Overheating(CONX) I I from a hot cooling system can blow out and bum you badly. They I are under pressure, andif you turn the radiator pressure cap-even a little-they can come out at high speed. Never turn the cap when the cooling system, including the radiator pressure cap, is hot Wait I Vow to Add Coolant to the Radiator: If you hear a hiss, wait for that to stop. for the cooling system and radiator I. You can remove the radiator pressure A hiss means thereis still some pressure pressure cap to cool you ever if cap when the cooling system, including left. have to turn the pressure cap. the radiator pressure cap and upper radiator hose, is no longer hot. Turn 2. Then keep turning the pressure cap, but now push down as youturn it. the pressure cap slowly to the left Remove the pressure cap. u t l it first stops. (Don't press down ni while turning the pressurecap.) ~ A Steam scalding and liquids I 200