Rattle/Vibration in engine (N52) when hot

enzed4 · Post by **enzed4** » Sun Jan 28, 2018 9:03 am

Have noticed this for some time now, but haven't really followed up on it as it comes and goes.
When the engine has warmed up, say 15 mins drive or more, while stationery, if the engine is revved to around 1500rpm there is a rattling noise that sounds as close as I can describe as a vibration of something like a heat shield (sort of a 'tinny' sound) which tapers off a few hundred rpm above. It doesn't seem to make this noise when cold, and not every time when hot, though seems fairly regular. I tried to record it a couple of weeks ago, but the wife's iphone audio capture didn't really do it justice. Might have to try again to help troubleshooting.
I've looked up many lifter rattle noise videos, and this doesn't sound like it at all - it's not that ticking noise, and that's usually more obvious when the engine's cold, not hot.
Also looked up Vanos rattle, but does this only affect pre-facelift models?

2008 E85, approx 32,000miles/51,000km, oil and filter changed every year.

Any ideas what this might be? I saw DLV mention an aux belt noise on another thread but couldn't hear anything when I listened to the video, so none the wiser if this might be something to look at.

R60BBA · Post by **R60BBA** » Thu Feb 01, 2018 12:27 pm

When you put it in for service do you get a shims report?

Buckz · Post by **Buckz** » Thu Feb 01, 2018 12:50 pm

dmf rattle? push you clutch in and see if the noise goes away.

rally-chris · Post by **rally-chris** » Thu Feb 01, 2018 12:52 pm

Shims?

N52 is a fit and forget engine as far as BMW servicing is concerned. Servicing equals visual checks, changing fluids, filters and spark plugs only. I think Ms (S54) are the only engines with routine lifter re-shimming at services?

Chris

R60BBA · Post by **R60BBA** » Thu Feb 01, 2018 1:18 pm

Shims should be checked on an Inspection 2.

If they haven’t been checked get them done at your next service.

hopz121 · Post by **hopz121** » Thu Feb 01, 2018 1:28 pm

R60BBA wrote: ↑Thu Feb 01, 2018 1:18 pmShims should be checked on an Inspection 2.

If they haven’t been checked get them done at your next service.

Not on a N52 mate

R60BBA · Post by **R60BBA** » Thu Feb 01, 2018 1:45 pm

http://www.engineprofessional.com/TB/TB110915-1.pdf

R60BBA · Post by **R60BBA** » Thu Feb 01, 2018 1:45 pm

hopz121 wrote: ↑Thu Feb 01, 2018 1:28 pm
R60BBA wrote: ↑Thu Feb 01, 2018 1:18 pmShims should be checked on an Inspection 2.

If they haven’t been checked get them done at your next service.
Not on a N52 mate

http://www.engineprofessional.com/TB/TB110915-1.pdf

hopz121 · Post by **hopz121** » Thu Feb 01, 2018 1:52 pm

R60BBA wrote: ↑Thu Feb 01, 2018 1:45 pm
hopz121 wrote: ↑Thu Feb 01, 2018 1:28 pm
R60BBA wrote: ↑Thu Feb 01, 2018 1:18 pmShims should be checked on an Inspection 2.

If they haven’t been checked get them done at your next service.
Not on a N52 mate
http://www.engineprofessional.com/TB/TB110915-1.pdf

That doesn't mention shims only changing the valve lifters which is a fairly common issue on the N52 engine as we all know, this isn't a servicing item.

R60BBA · Post by **R60BBA** » Thu Feb 01, 2018 1:57 pm

hopz121 wrote: ↑Thu Feb 01, 2018 1:52 pm
R60BBA wrote: ↑Thu Feb 01, 2018 1:45 pm
hopz121 wrote: ↑Thu Feb 01, 2018 1:28 pm Not on a N52 mate
http://www.engineprofessional.com/TB/TB110915-1.pdf
That doesn't mention shims only changing the valve lifters which is a fairly common issue on the N52 engine as we all know, this isn't a servicing item.

BMW Park Lane include valve clearence as apart of their Inspection 2.

hopz121 · Post by **hopz121** » Thu Feb 01, 2018 2:36 pm

R60BBA wrote: ↑Thu Feb 01, 2018 1:57 pm
hopz121 wrote: ↑Thu Feb 01, 2018 1:52 pm
R60BBA wrote: ↑Thu Feb 01, 2018 1:45 pm
http://www.engineprofessional.com/TB/TB110915-1.pdf
That doesn't mention shims only changing the valve lifters which is a fairly common issue on the N52 engine as we all know, this isn't a servicing item.
BMW Park Lane include valve clearence as apart of their Inspection 2.

Not on an N52 they don't

rally-chris · Post by **rally-chris** » Thu Feb 01, 2018 3:17 pm

ph001 · Post by **ph001** » Thu Feb 01, 2018 4:39 pm

Dare I ask if it sounds similar to this?..... https://www.youtube.com/watch?v=cgtHUhG ... e=youtu.be

Here are a full 9 pages to read on it! Still don't think the mystery has been solved as far as I know

https://z4-forum.com/forum/viewtopic.php?f=3&t=100400

Marlon · Post by **Marlon** » Thu Feb 01, 2018 5:23 pm

ph001 wrote: ↑Thu Feb 01, 2018 4:39 pmDare I ask if it sounds similar to this?..... https://www.youtube.com/watch?v=cgtHUhG ... e=youtu.be

Here are a full 9 pages to read on it! Still don't think the mystery has been solved as far as I know
https://z4-forum.com/forum/viewtopic.php?f=3&t=100400

I hope not for the OP's sake - absolute nightmare that thread

enzed4 · Post by **enzed4** » Fri Feb 02, 2018 5:55 am

Buckz wrote: ↑Thu Feb 01, 2018 12:50 pmdmf rattle? push you clutch in and see if the noise goes away.

No clutch, it's not a real man's car sorry

ph001 wrote: ↑Thu Feb 01, 2018 4:39 pmDare I ask if it sounds similar to this?..... https://www.youtube.com/watch?v=cgtHUhG ... e=youtu.be

No, that sounds like a definite 'clatter' - mine's more of a fast vibration, almost like something has heated, expanded, and is touching something it doesn't when cold (which made me think of the heat shield).

Thanks for the suggestions so far, looks like I might have to upload a clip to see if it helps pinpoint it.

Z4-forum.com

Z4-forum.com