yes, side to side is normal, it has to have some for oil clearance in the bushings. if it has none something is wrong. i have seen turbos you could visually see lots of side to side, it is ok. zero endplay, that is what grenades turbos. If they have endplay the wheels hit the housings and kablooey.I got my rebuilt turbo today and it has side to side play, should it have any at all??