40d X5 f15 sounds like london black cab

[sixcylinders]

[IMG]https://photos.app.goo.gl/QusmWe8z18U4AZHz9[/IMG]

Hi folks

It's only done 40K miles approximately and it's developed a hollow knocking noise like a tired london black cab (hallmark noise) audible at idle. Any ideas what's causing this?

https://photos.app.goo.gl/QusmWe8z18U4AZHz9

[Clifton]

What is it that you hear wrong? Sounds like a happy diesel to me.

[sixcylinders]

Originally Posted by Clifton

What is it that you hear wrong? Sounds like a happy diesel to me.

It's difficult to hear but it's the lower frequency hollow noise characteristic of a knackered London cab. I'll try to take a better recording.

[Cheche]

Sounds good to me as well, no metal knocking that I can discern

[Dharoon7869]

Yeah that is not right. I have a 40d and mine certainly doesn’t sound like that.

[sixcylinders]

Originally Posted by sixcylinders

It's difficult to hear but it's the lower frequency hollow noise characteristic of a knackered London cab. I'll try to take a better recording.

https://photos.app.goo.gl/9KNFViy8HqrXgztAA

Thank you for watching the video. Here's another.

[Mr.47]

Originally Posted by sixcylinders

https://photos.app.goo.gl/9KNFViy8HqrXgztAA

Thank you for watching the video. Here's another.

Sounds normal diesel x5, my x5 35d gets a little noisier when engine is cold and/or the ambient temp is low it has that throaty idle and pronounced injector knock/tick, once warmed up it fine.