How hard is it to change/flush radiator coolant on au falcons?
It’s not that hard takes a bit of time and you could buy a flush kit at some auto parts stores that will help you , plus it be a not bad idea to have a proper anti-freeze tester handy , new thermostat gasket and thermostat , plus the right factory recommended coolant. No1 get a few drain pans etc , open the rad drain plug and once all the coolant stops coming out close the valve , add warm tap water to the rad or over flow container until full. No2 start the engine allow it to run until warm then turn on the heater blower until steady heat comes out for a min or so and turn off car. No3 Drain the rad again fully then close the valve again and add the chemical flush that you can buy for rads etc and water until full. No4 Start the vehicle and allow for it to run at least 5 mins always keeping an eye on the temperature gauge, then shut it off. No5 Now add disstilled water to the system and start the vehicle for the water to circulate again , then turn engine off and redrain rad and keep