How do you bleed the cooling system on a 1991 Volvo 940SE turbo?

To bleed the cooling system on a 1991 Volvo 940SE Turbo, first ensure the engine is cool and then remove the radiator cap. Start the engine and let it idle, allowing the thermostat to open, which will enable coolant flow. As the engine warms up, check for air bubbles in the radiator; if present, rev the engine slightly to help expel trapped air. Once the bubbles cease, top off the coolant reservoir to the recommended level and replace the radiator cap securely.