During a 500 mile round trip to London, a strange grumble started.
It comes from the front and is quite difficult to describe. It's like the noise of a big grumbly Scooby exhaust, but not as loud.
It is most notable on the overrun and is not present at idle.
I'm not too technical, but suspect some aspect of the front exhaust system or maybe a wheel bearing?? Engine oil is okay and never been run low AFAIK.
I'm going to take a look with my brother this week, but any thoughts/common things to check?
I know it's difficult to tell without hearing it.