Tucson seized turbo 2.0 diesel help
 

Hello, first post. My turbo was seized up for some reason and my mechanic replaced it. All oil was getting through and it seemed ok. I collected the car last night and it seemed very sluggish and made lot of air noise behind the bulkhead. I took it down the A3 tonight for 1 junction and it wouldn't even get to 60 mph. Really not sure what this could be, any ideas ?

David