While I have the exhaust/turbo pulled off, I'm left wondering if I should do anything with the turbo, in terms of rebuilding. So I'm wondering if there's really a good way of determining if it's really needed or not. As far as I can see, there are no visible oil leaks. Last time it was on the car and the car drove, it was generating about 9psi...so it was functional.

But, when trying to manually turn the vanes on the turbo with my fingers, it moves, but instantly stops as soon as I stop applying pressure. How freely should it really spin though? Should I be able to give it a good push and see it spin a few revs before stopping?
Keep in mind that this was attempted while the turbo is sitting in a sub-freezing garage. Would this make a difference?

__________________
Chris
1985 300SD - 'Grace' (198K mi.)
2018 Honda Civic Sport
2018 Honda CRV LX
2010 Honda Fit Sport (RIP)
2013 Honda Accord Sport (Sold)
1996 Lexus LS400 (Retired)
1995 Ford Contour SE (Retired)
1976 Porsche 914 (Sold)
1972 Datsun 240Z (RIP)