Engine Cooling problem
1997 Range Rover V8 Four Wheel Drive Automatic 140000 miles

how do you remove air pockets from the cooling system?the car started to run hot yesterday and i pulled over and took the upper radiator hose off and air blew out along with coolant. Left it off for a few minutes then pour more coolant into the block and car ran just fine. This same thing happened a week prior. I went ahead and changed the thermostat but wanted to know how to remove air pockets. The radiator and water pump are less than a year old. The engine was replaced a year ago as well.