1998 Oldsmobile Achieva Owner's Manual - Page 253
1998 Oldsmobile Achieva Manual
Page 253 highlights
Surge Tank Pressure Cap Power Steering Fluid I NOTICE: Your pressure cap isan 15 psi (105 kPa) pressure-type cap and must tightly installed be to prevent coolant loss and possible engine damage from overheating. When you replace your surge tank pressure cap, a GM cap is recommended. Thermostat Engine coolant temperature is controlled by a thermostat in the enginecoolant system. The thermostat stops the flow of coolant through the radiator until the coolant reaches a preset temperature. When you replace your thermostat, an ACDelco@ thermostat is recommended. When to Check Power Steering Fluid It is not necessary to regularly check power steering fluid unless you suspect there is a leak in the system or you hear an unusual noise. A fluid loss in this system could indicate a problem. Have the system inspected and repaired.