CM 870 turbo

[Chamberpains]

I don't know anything about prelubing a turbo. I would assume who ever built or rebuilt the turbo would have taken the necessary steps to avoid dry spin on start up. On certified builds everything need to be lubed to prevent things from rusting while sitting on the shelf. But i guess a little engine oil in the oil port and a quick spin of the impeller wouldn't hurt.
Be sure you torque the 4 mounting bolts/nuts to 75 ft/lbs. And recheck them after it runs for a few day.

I just found mine loose today. I had a shrill whistling after a hard pull that sounded like the bearings were seizing. Nope, just loose mounting nuts. When the manifold and turbo would heat up they expand and everything was sealed and quiet then letting off the throttle on the down hill they would cool and contract allowing just enough of a leak to whistle and shreak at the gasket.

I tightened my nuts and the shreaking stopped....