1993 Buick Regal Owner's Manual - Page 233

Radiator Pressure Cap rower Steerlng Fluid 1; NOTICE: .: Your radiator capis a 15 psi (105 kPa) q:. 1 L : pressure-type cap and must tightly installed : be ,*to prevent coolantloss and possible engine damage from overheating.Be sure the arrowson the cap line up with the overflow tube on the 8 : radiator filfer neck. , . When you replace your radiator pressure cap, an AC@ cap is recommended. Thermostat Engine coolant temperatureis 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. How To Check Power Steering Fluid: Unscrew the cap and wipe the dipstick with a clean rag. Replace the cap and completely tighten it. Then remove the cap again and look at the fluid level on the dipstick. 0 When the engine compartment is hot, the level should be at the "HOT" mark. When the engine compartment is cool, the level should be at the "FULL COLD" mark. 0 231