If this is for an S-Series, you don't have to, The system has a deairiation line and does it on its own.
You need to burp the radiator and cooling system.
It should have a bleeder screw on top of the thermostat housing.
The cooling system on a 2001 Mitsubishi Eclipse GT can be burped by gently squeezing the upper radiator hose. Keep topping the overflow tank until the air is purged.
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burp the water system that may help
Locate the plug on the bottom of the radiator to drain it. Put some radiator cleaner in and drain it again.
The air bleeder plugs on a 2002 Saturn cooling system are typically located near the highest points of the system, such as near the radiator or on the engine block. They are used to release any air trapped in the system to ensure proper coolant circulation. Consult your vehicle's manual for specific locations.
You carefully remove the top coolant hose to the heater, not totally off, just enough so air can get out.
Remove coolant cap, allow engine to get to operating temperature, turn on heater full blast and patiently wait for air to escape system.
pop the radiater cap off and let the van engine run for 30 minutes. this will burp out any air in the cooling system and your engine will not overheat then. afterwards, fill the radiater back up as needed.
you need to burp the cooling system
Use the Gold antifreeze. It lasts longer and does not cause corrosion to the cooling system.