Turbo spins then tightens to a stop

[Snazzyblowfish]

Right, i took a risk and decided to rebuild my own turbo, it's all back together and hunky doory. Apart from when the exhaust turbine spins, it tightens the nut on the compressor fan until I physically cannot turn it. Any idea?

[micky boy]

Is the exhaust piston ring seated correctlly? if thats not sat right in it will do what you are saying

[Liam_D]

yeah sounds like its been built incorrectly!