hello got a new wheel bearing today genuine one! And there was a plastic insert between the bearing. so as im removing it, half the metal inside ring comes abit out with it? so i can see the ball bearigs, It has some sort of white grease in the bearing anyway. i remove the rest of the plastic insert then it comes out with it and i push it back in. Is this ok? or is the bearing fucked? dont fancy fitting a new bearing thats fucked? are they all like this?