330i M54 Tip in Rattle

[Shanksy87]

I'm at a bit of a loss to the cause of a rattle when tipping in to the throttle. It only happens just after applying throttle to pull away at ~1000rpm and clears soon after that.

I've had a listen and it sounds like it's coming from the centre of the cam cover around cylinders 3/4. It could just be reverberating in the cam cover and be a misdirection to the true source but I can't for the life of me work out what i'm dealing with here.

From what I can tell VANOS rattle is at higher rpms and sounds subtly different. This is very much like when you grind the gears in a manual.

Any ideas or experience of similar would be great to hear

[Ian Geary]

Hi,

No direct experience as I have an N53 so this a guess, but are your aux belt pullies ok?

On my motorbike a ticking sound is usually a leak at the manifold, but this would follow revs and wouldn't go away.

Most heat shields are near the middle of back, but they can be a suspect for light rattles.

Finally, have you done any work to he car recently? Retracing steps can sometimes helpmfine loose things.

Hth

[330ti]

Disa valve maybe

[Shanksy87]

In case anyone stumbles across this issue in future, the answer to the rattle at around 1000rpm only was a loose heat shield on the engine mount where the rivet had sheared off causing the shield vibrate in only in a specific circumstance.

HTH

[dhutch]

Shanksy87 said:

In case anyone stumbles across this issue in future, the answer to the rattle at around 1000rpm only was a loose heat shield on the engine mount where the rivet had sheared off causing the shield vibrate in only in a specific circumstance.

HTH

Fair, I think I have some of this going on!