Do I need to flush my new radiator? It seems like some people swear you need to and others do not without any problems. I have also heard that lower end radiators have more flux and crap in them, which means you should flush. What is the right answer? Hehe. If it is that simple. I have a Hardware Labs Black Ice SR2. It is installed with fans already and I am leaning towards not taking it apart and flushing it.