? for those who have rebuilt their own turbo


Jun 24, 2001
Ok, I rebuilt a stock 87 GN turbo tonight and noticed that there is a lot of clearance between the journal bearings and housing.

After dropping the new bearings (or bushings) into the housing and installing the snap ring you can move the bearing up down and side/side in its bore. Just by eyeballing it I would say the bearing moves about .050 or so side to side.

After completing the job the turbo has no thrust play but has enough side play to where I can force the bottom of the compressor wheel to hit the machined relief in the backing plate by pushing on it.

Any opinions as to whether or not this is normal? Thanks!
Once the oil pressure comes up it will float the shaft through the bearing. Should it touch the housing? Ideally no.