What is this bloody noise!!

[Clgale1988]

So last couple weeks been trying to find a noise i get when i start the car. Now after leaving the car for a week not started etc iv now got a new loud noise. Iv took it to my local mechanic and he seems to think its coming from the throttle body as he said its electronic and thinks it could be that going. Can anyone else help me out heres a video.

http://s560.photobucket.com/user/clgale88/media/8C2398C7-9E3B-4CEB-A0A4-4A29B6656A71_zpsgv9wztdf.mp4.html

[Adam0604]

Wtf sounds like you have a generator running under there

[Clgale1988]

I know mate i left it sat for 5 days come back and sounds like that goes after iv drove it for abit but its still there very faintly but its definatly coming from the throttle body by sounds of it

[r5gtt]

Check the fans as something could be touching them?

[Clgale1988]

Would that happen as soon as i start it though as after while it goes away

[r5gtt]

It could well be the motor in the fan playing up and once it's warm is goes away but come back when it's stone cold.

[Clgale1988]

So would that come on straight away then as that video is me just started the car up. Would the fan motor be working or on? Also if you slowly rev the car when it makes the sound the noise gets faster.

[r5gtt]

The fan shouldn't come on at this point but it is known to happen.
Have you had a look down in the bay for anything touching?.

[Clgale1988]

No not yet as its only very faint now as iv drove it some more. Noise defo seems to be coming from top sonewhere near the throttle body i will have a look by the fans see if anything touching just seema strange that he noise gets quicker when you rev the car wasnt sure the fan would do this

[Scottymon]

Have you tried refitting the engine cover? 
When was the cam Belt last changed?

[Clgale1988]

Cambelt was changed 1k ago and it dosnt sound like its coming from there

[Clgale1988]

Checked fans nothing touching and the noise isnt coming from there

[r5gtt]

open the bonnet and take abother video closer to throttle body

Could also be the auxiliary cooling pump?.

[Clgale1988]

Il try but isnt doing it much now as iv been using the car when it does it again il grab a closer video

[r5gtt]

Hope you sort it out.