IIRC If I Remember Correctly.
I have not had messed with my turbo yet, as I have not had the need to, but I do need to change the U -Tube seals, so I'll be doing the spin test and the lateral play test by hand.
Engine needs to be turned off, and cold, or slightly warm. With the U-Tube off, spin the blade of the turbine and it should spin very feely. Then see if you can make the turbine move back and forth on it's axis. You do not want it to move laterally. If it does not spinn freely, or if you see broken or cracked fins, it is time for a rebuild or replacement.
If you do run the engine, with the U-Tube off, you run the high risk of having something sucked in, including your fingers. Turbo fins make nice slicers.
