Well I just picked up my 03 F4i last week with 2,300 miles on it. I have read up on them a lot since I sold my f2. I know the CCT is a big problem around 5,000rpms. I have a rattle around 2500-3000rpms then no rattle till about 5000rpms and then it rattles again? Is this the CCT going out already?

Also I have a tick at idle that goes away when I get above 2,000rpms? What could that be?

 

very likely the CCT