Hi, You will always have some side to side movement, this is quite normal as the bearings are fully floating... about 0.5 mm is normal, any more than that and the bearings are starting to wear.... in and out movement is controlled by the thrust bearing. any movement in this direction can be considered wear as it will cause the oil control rings (seal) to damage there seatings, and the end result will be smoke ...!!!!

Hope this helps....

Cheers

Steve