1994 Oldsmobile Achieva Owner's Manual - Page 162
1994 Oldsmobile Achieva Manual
Page 162 highlights
Problims on the Road I NOTICE: In cold weather, water can freeze and crack the engine, radiator, heater core and other parts. So use the recommended coolant. I I. You can remove the coolant surge 2. Then keep turning thepressure cap tank pressure cap when thecooling system, including the coolant surge tank pressure cap and upper radiator hose, is no longer hot. Turn the pressure cap slowly about onequarter turn to the left and then stop. If you hear a hiss, wait for that to stop. A hiss means there is still some pressure left. slowly, and remove it. 3. Once thepressure cap is off, look inside the surge tank opening and look for a small cylinderat thebase of the opening. This should be covered with coolant. If the cylinder is uncovered, the coolant in your system is low. I60