High pitch sound from MG ZR

Hello,



I am getting some high pitched sound coming from the front of the car on & off at verious times; I think its when I am in lower gear. I'm not sure what it is but I did have my engine changed around this time last year, maybe something to do with that?





I tried to record the sound via a video which I have uploaded to my YouTube channel. I would apprecite if anybody has any idea what is wrong.



Thanks





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