undo the bottom radiator hose (or try to get the bottom heater matrix hose off), if you take the bottom heater matrix hose off then the water flushes through the whole of the engine and matrix so you have no deposits left...only do either one though, the rad hose or the heater matrix hose
wait for all coolent to come out
open expansion cap and get a hose and flush the system through with clean water to get all crap out...if you do manage to get the heater matrix hose off then keep squeezing the top rad hose while your flushing it with water from the hose
put hose back on
how many litres is in the coolent bottle you got there?? 2L im assuming, put about 1L of coolent in the system first then fill the rest up with plain water from the hose, then start the car and let it get up to full temp with the expansion cap off so that you have no air leaks...while you do this you might realise that the coolent level is dropping, just keep topping it up untill its stays at ther proper level
easy peasy
