How much radial / axial play is allowed on the Turbo shafts?
There are two directions of play to test for, first is axial, (front/back as installed in the car) there should be none. The other is radial, (left/right or up/down as installed in the car), there will be some play in the turbo shafts even in a new/re-built set, all though not much. A way to gauge this is to see if the play is more than 1/2 to 2/3 of the nominal clearance from the compressor blades to the housing. I.E. with the compressor wheel centered in the housing measure the distance to the housing, (Figure 1: dimension “A” and “B”). Then move the compressor wheel as far as it will go to one side, then see if this is more than 1/2 to 2/3 of the original distance, (Figure 1 & 2: C > [(2/3) * A] or D < [1 - (2/3 * B)]. IMHO getting near to 2/3 is getting pretty worn but still able to be used, 1/2 is probably good for a while. Kind of vague, but my opinion ;-). Assuming less than 2/3 play and the housings in good shape, I would not re-build at this time. PS don't play too much with t
