2012 e91 318d Ticking at idle

[Snowy-lowey]

Hi there

My car has developed a ticking noise at idle, which is louder when the engine is warm. Car has done 28000miles. Not sure if this is normal!

I have attached a link to the video

https://www.youtube.com/watch?v=VF3OG-p1-tE

[TheEnd]

Are you on about the roughly once per second hiss noise?

[Snowy-lowey]

Yes, it sounds to me like a metallic ticking noise, and I reckon its getting louder.

[TheEnd]

It's possibly something belt driven, or maybe even a slip of rubber coming away from the belt.
It's a lot slower than the engine rotation, so I'd think it was something external.

[Ciff]

sounds like the n47 timing chain sadly. rev it to 1500 and it will sound worse if its the chain

[TheEnd]

Try taking it to BMW, there was a recall for the guides, the noise could be a bad section of the chain rubbing on a guide, but I think 2012 is past the point where BMW believe they fixed the problem, so they might not want to do it under "goodwill"

[Snowy-lowey]

Hmm, the consensus does seem to be that something's not quite right. It was taken into a BMW dealer to be looked at, unfortunately I had other commitments so a family member had to take it in. And apparently the mechanic came out had a quick listen and said it all sounded normal. Although I'm not convinced!

[Snowy-lowey]

Right quick update, Took the car in to an independent who agreed the noise wasn't normal, although they did not think it was timing chain related. A drive belt was changed although unfortunately the noise persists.

[PDP76]

Agree with posters above, sounds belt driven. I'd be looking at the pulleys/getting them checked.

[Nico7135]

Did you find any solutions to the problem? I have 320d with the exact same problem