On cold start only (after overnight), I get a very fast clacking / knocking / rattling sound for about 5–10 seconds, then it completely disappears and never comes back when warm.



Oil has been changed, level correct.

No warning lights, no noise when warm or driving.



Video attached for reference.
took it to a shop but they have no idea



Has anyone experienced this on the P400 / Ingenium I6?

 

My bad, couldn't get the video to play on my phone. Totally not normal. The "normal" knocking noise is more like a brief higher pitched tapping sound.

 

It might be related to the CVVT....

 

Not normal at all. check you exhaust manifold bolts

 

I was thinking the same thing.

I fear this is becoming a more frequently reported issue on the forums. Or at least the noise is. So hard to get to the bolts to see them.

 

Really don’t think it’s normal, I’ve had the car since new and it only started doing this now. The car has 28k miles.

Not able to take it to dealer yet but something has to be wrong.

 

Yes definitely not normal, will have them checked.
Car has been regularly serviced and have tried and oil change but no luck.
thanks for the shout

 

Wait you are kidding me ... this is far from normal. Not normal. To the dealer !

 

Ask the audience - not normal.
Phone a friend - not normal
50/50 - not normal

I think you know the answer before you even asked the question

 

Please let us know what happens.