Run Engine and Actively Bleed Air

What happens here

With the specialized funnel securely in place and partially filled with coolant, the creator starts the car's engine. He then turns the car's heater on to its low setting to ensure coolant circulates through the heater core, thus purging any trapped air from that part of the system. He monitors the coolant temperature on the digital dashboard, explaining that the thermostat will open around 195-205°F, and the cooling fan will engage around 210°F. As the engine warms up, he observes a significant increase in bubbling from the funnel once the thermostat opens, indicating that air is actively being expelled from the engine block and radiator.

Goal: Circulate coolant, open the thermostat, and purge remaining air bubbles from the system