hello everyone,
is it possible for this part that i have circled on the pump, to become loose and be able to twist around?
As it's just a press fit in the pump housing: yes.
thanks guys,
how do i fix it in again? is it possible to repair that bit?
Step one would be simply try knocking it back in with a hammer and block of wood. If that doesn't work use some Loctite 242.