1994 Oldsmobile Achieva Owner's Manual - Page 190

Service & Appearance Care Surge Tank Pressure Cap NOTICE: Your pressure cap is an 18 psi (124 kPa) pressure-type cap and must be tightly installedto prevent coolant loss and possible engine damage from overheating. When you replace your surge tank pressure cap, a GM cap is recommended. Power Steering Fluid How To Check Power Steering Fluid Unscrew the cap and wipe the dipstick with a clean rag. Replace cap and the completely tighten it. Then remove the cap again and look at the fluid level on the dipstick. When the engine compartment is hot, the level should be at theH (Hot) mark. When the engine compartment is cool, the level should be at the C (Cold) mark. Thermostat 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. When replacingthe pressure cap, make sure it is tight. 188