I have the two piece fan shroud that rotates to separate (even though the FSM says I don't). When putting things back together is it possible to put the two pieces in place after the fan and radiator are installed? I took it out in one piece after removing the radiator because I didn't realize it separated, but it was nearly impossible to get the radiator drain valve and the lower hose fitting past it. Or should I place the inner piece over the fan, then slip the outer piece in after the radiator?