How to bleed air out of your car cooling system in an emergency situation. Pull out one returning cooling holes or lines, start your engine and keep the engine running, allowing the thermal energy to do the boiling of the coolant, keeping extra coolant for topping up through the reservoir, keeping monitoring the temperature uniformity. If all cooling holes maintain uniform temperature, then you are done, turn off your engine, fix the returning holes and check your coolant level #5continents1car1