I got a new turbo fitted at the weekend but its making the same siren noise as the old one . so is there anything else on the car it could be, i.e a bearing somewhere else although it only makes the noise when it coming on & on boost. its not possible that its a worn bearing in the turbo so would it make the noise if it hasnt been balanced properly?.

im very confused.

please can any one shed some light on this. i've checked the shaft and there was some play when it was hot (i think) yet when it was cold i couldnt feel any play. am i mental or is something odd