Turbos did end up to be screwed. Some of the blades have been "snapped" off so I am looking for an aftermarket pair at the moment. But if I cant find any I will just get them Steel Wheeled. - *This was not caused by the loose pulley obviously*
It also needs a brand new crank with bearings etc, because the crank in it now is pretty f**cked and cannot be repaired. In order to fix it is going to cost me approximately $3,300 all up.