Should be alright if there was no play. Might be an air leak somewhere causing the whistling.Good idea I'll definitely give that a go. I've noticed since fitting the second hand turbo there is slight whistling sound that comes from the turbo when you initially start to accelerate, once it gets going it disappears and there isn't any loss of power. I just wondered if this is normal or something i should look in to further? The only difference with this turbo is that it was broken from an estate and mines a hatchback but i checked with the buyer beforehand and the engine codes were the same. He didn't have the car mapped or anything. I'm not expert on turbos but i did check the turbo shaft on both sides and there was no shaft play and the VNT lever was moving nice and freely too.
I know you always take a risk when buying used turbos but couldn't afford a brand new one so second hand was the only option i just hope it's gonna last and this is not the start of something more serious.