2009 Aygo "Blue" mechanical rumbling when driving off?

[Kangaroo1]

Hi all, I've recently (perhaps a couple of months) noticed a slight "sort of" rumbling noise coming from the near side front when I pull away, from start up. Once I get moving it disappears and a minute or two into my journey I don't hear it again, even when stuck in the usual stop/start traffic. To be honest I've always wondered if it might have been exhaust related, but this morning however, it was quite a bit louder, certainly noticeable & now I'm certain that it isn't exhaust related, because it definitely sounded mechanical! Again though, once I was a minute or 2 into my journey, it went away & I never heard it again.... The car's been sat outside my office all day, so I'll check it again when I leave for home, but in the meantime, does anyone have any ideas what this could be? 

Thanks in advance!

[Colin J.S]

Hi............would you be able to say...........does this noise happen when driving (accelerating) or braking? 

 

[Kangaroo1]

Hi Colin, the noise seems to be there only when accelerating.

[Ben565]

I wonder if it's some sort of gearbox/engine bearing, grumbles when cold but goes away once the oil warms up. Big end maybe? 

[Kangaroo1]

Hi Ben,

Thanks for your feedback. A bearing is quite possible, and would certainly fit the symptoms.

Not big ends though... I've had big ends go before, on an old car I basically ran into the ground, many years ago (in the 1980's!!) when I was a lot less sensible, and the sound is definitely different.

Thanks.