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Discussion Starter #1 (Edited)
Ever since i got my rod bearings and vanos high pressure lines changed this summer my vanos has been very loud. I know my local indy (who is very knowledgeable when it comes to M cars) bled the vanos after replacing the vanos hp lines, but could there still be air in the system?

Here's a clip. The car is slightly below operating temperature. After some driving the vanos become considerably quieter, but it's still louder than it used to be.

+ https://youtu.be/edQ0f7jymVA" title="View this video at YouTube in a new window or tab" target="_blank">YouTube Video
https://youtu.be/edQ0f7jymVA"> https://youtu.be/edQ0f7jymVA" /> ERROR: If you can see this, then YouTube is down or you don't have Flash installed.
 

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I am not convinced it sounds any different from mine. Maybe it is the sound quality in the video and I won't hear the nuances you hear. There might be no issue. Are the ionic cover properly bolted down (e.g. no loose). They tend to amplify the VANOS sound, especially when they are loose. Feel for them being mounted solid on the engine.
 

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Discussion Starter #5 (Edited)
Ok. Thanks for the replies guys! The car drives better than ever, so i'm not that worried about it, it's just that the sound gets on my nerves. Especially in city traffic with a lot of stop and go driving etc. On the other hand it kinda makes sense that the vanos sounds worse than before since it's now operating under full oil pressure.
 

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Discussion Starter #6
I get the impression that, apart from early production years, these cars have a fairly reliable vanos system and that most of the vanos work people do is based on very unreliable diagnostics (ie Dis vanos solenoid test and sound/noise alone) and is often ompletely unecessary.
 

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my left bank has been loud as **** (just like in your video) for 5 years now. mine is a 2006 with 81k miles....im used to it now. but i do get a little upset when i hang with by buddy who has an 2008 with 90k miles on is and its whisper quiet.


not sure why some cars are quiet and others tick like diesel engines...
 

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Discussion Starter #8
my left bank has been loud as **** (just like in your video) for 5 years now. mine is a 2006 with 81k miles....im used to it now. but i do get a little upset when i hang with by buddy who has an 2008 with 90k miles on is and its whisper quiet.


not sure why some cars are quiet and others tick like diesel engines...


Funny how the noise seems to vary from vehicle to vehicle. Are there any good theories as to why this is the case?
 

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my left bank has been loud as **** (just like in your video) for 5 years now. mine is a 2006 with 81k miles....im used to it now. but i do get a little upset when i hang with by buddy who has an 2008 with 90k miles on is and its whisper quiet.


not sure why some cars are quiet and others tick like diesel engines...
Might I suggest adding some Liquid-moly MoS2. I found that in my I6 cars, they quieted right down. I find, oddly enough, that noise in the M5 tends to be louder with the thicker oil - based on what others have written here and in the S65 oil / bearing threads.
 

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Ever since i got my rod bearings and vanos high pressure lines changed this summer my vanos has been very loud. I know my local indy (who is very knowledgeable when it comes to M cars) bled the vanos after replacing the vanos hp lines, but could there still be air in the system?

Here's a clip. The car is slightly below operating temperature. After some driving the vanos become considerably quieter, but it's still louder than it used to be.

+ https://youtu.be/edQ0f7jymVA" title="View this video at YouTube in a new window or tab" target="_blank">YouTube Video
https://youtu.be/edQ0f7jymVA"> https://youtu.be/edQ0f7jymVA" /> ERROR: If you can see this, then YouTube is down or you don't have Flash installed.

If its still loud, try running the vanos bleed procedure.
 

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Mine sound identical to this 2006 M5 with 29000 miles. I've never use INPA however in ISTA there is a option for venting the VANOS I'm sure it's somewhere in the menus.
 

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I was curious to hear the sound you were talking about. I've read about it, but never understood it until now.

Wow that's loud. But it seems that it's normal from what others have posted. I have an '08 with 103k and it's super quiet. That noise would make me crazy, especially if you just had work done to the system.
 

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I took three bleed procedures to quite my S85 down after VANOS valve replacement. One bleed cycle may not have cut it...
 

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Discussion Starter #16 (Edited)
I was curious to hear the sound you were talking about. I've read about it, but never understood it until now.

Wow that's loud. But it seems that it's normal from what others have posted. I have an '08 with 103k and it's super quiet. That noise would make me crazy, especially if you just had work done to the system.
Mine used to be quiet aswell, but after the vanos repair it's been crazy loud. Funny thing is though that i made two longer trips last week and the car is actually a bit quieter now. I really do suspect there's still some air in the vanos somewhere. I'll probably let my indy bleed it at some point, if i can't find a way of doing it myself using INPA.
 
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