Quick Vanos question

[buggalugs]

Wonder if anyone's experienced this?

It's an E46 328i (dual vanos M52) with about 175K miles on it.

When warming up, i.e. from about 1 minute after startup to about 5 minutes, and only around idle, there's sometimes a sharp short rattle type noise from the area of the vanos units. After one of these the idle stumbles then quickly recovers. It definitely sounds like the noise causes the stumble and not the other way round.

It's currently filled with Mobil 1 0W40 and this happens on both petrol and LPG.

Something to worry about?

Thanks
Neil

[528Sport]

Hi,

have a look here http://www.beisansystems.com/

I did mine, cured the dip in revvs. Mine also did a sharp rattle.

Takes a few hours to do the job.

I'd also say my car performs better as well.

I'd also say the oil your using is too thin. I use 5/30

[phelix]

Didn't have the rattle but did have the hunting ideal - the same seal kit worked a treat.

[buggalugs]

Wicked, will get on that.

Thanks!