An air pocket in a cooling system is a pocket of air that has become trapped in the system. This can occur when the system is bled or filled, or when there is a leak in the system. Air pockets can cause the system to overheat, as the air will prevent the coolant from circulating properly. Removing air pockets from a cooling system is a relatively simple process, but it is important to do it correctly to ensure that the system is operating properly.
There are a few different ways to remove air pockets from a cooling system. One way is to use a vacuum pump to pull the air out of the system. Another way is to use a funnel and hose to fill the system from the bottom up, which will help to push the air out. Finally, you can also use a burp gun to remove air pockets from the system.