Another funny noise thread

Over the last couple of days when starting my F it has started making this odd tapping noise, it changes with acceleration but after about 5 - 10 mins of driving disappears.



I have tried to capture it below with the blipping of the accelerator.



http://ift.tt/1hMK3bo



It sounds like it's coming from around the top of the engine but I cannot be sure.



Anyone any idea?



Thanks



Si.

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