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10-06-2015, 03:42 PM | #23 | |
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02-07-2016, 01:00 PM | #24 |
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I have this noise too and was worried about it, specifically mine also appears at 2500 -3000 rpm under light load in 3rd gear (but not in 1st or 2nd). In 4th gear (or higher gears) road noise and air aerodynamic noise may be covering it as i cannot hear it and it is slight in third gear.
It seems there is a moderate consensus that it's just resonance from/through the air intake or natural resonance from the engine with the air filter. It would be nice if someone could post an audio file of it. I will try if i get a chance. |
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11-03-2016, 09:49 AM | #26 |
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It sounds a bit more sinister than air flow resonance. Sounds metallic imo...
The fluttering sounds seems to be less sIgnificant when using a higher octane fuel. Would this mean engine knocking at lower octane fuel? |
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01-10-2017, 05:43 PM | #27 |
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I have the exact same sound and it is definitely not air intake sound as we all know intake sounds beautiful. I first took my car to a several local BMW independent shops. But one thought it was engine knocking and other could not identify. So I ended up dropping it off at Southbay BMW. I just got a call from them and they weren't able to find any issues with the car and telling me it's normal sound... I just cannot agree with them as it is metal chirping sound almost like something is very loose...anyways, I hope someone can identify this sound. At this point, I'm just glad it's not engine knocking, but would like to know what it is.
Last edited by kooolaid; 01-10-2017 at 05:54 PM.. |
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04-11-2017, 04:44 PM | #28 | |
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Lots of people have this noise. most of them think it is airintake, But some times this noise will gone. One time, I am almost out of gasoline, this noise is gone, and today, I put my Stock Xpipe back, this noise is gone too.(I had ran a MS catless xpipe) |
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04-12-2017, 03:21 AM | #29 | |
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I am getting the exact same pinging noise, rattling and intermittent tick. The pinging noise has come on in the last 2000km and the ticking and rattling noises have ONLY come on since my change from TWS to LiquiMoly. The LM has made my engine a heck of a lot mechanically louder and produced an intermittent tick that wasn't there before (This is identical - ) The suggestion from my mechanic was to swap the rod bearings ASAP. So once I can get a hold of some BE shells and studs it will come out of the garage again. I'll let you know if it resolves the noises. Craig |
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04-28-2017, 05:56 PM | #30 |
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anyone figure out this noise?
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04-28-2017, 11:29 PM | #31 |
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Hey mate,
I am intermittently getting the same sound. Apparently a potential cause is the low pressure fuel sensor playing up. I have that and other issues like running rich, really rough starts. I have a LPS on order, if it fixes the issue I'll let you know. Craig |
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06-26-2017, 02:51 AM | #32 |
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Same rattling issue here in my car and inside the car it almost sounds like the exhaust is rattling.
SouthernBM kept the car for a couple of days but couldn't find a problem. It's heading in tomorrow for it's 50k service and I'll get them to check it again. Thanks to the poster of the vid, super helpful! |
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06-27-2017, 01:43 AM | #33 |
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Shift down and drive faster, keep the rpm above 3k guys.
All is well all is good
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06-27-2017, 03:00 AM | #34 | |
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Happens when we suddenly mash down the pedal to accelerate. But not in 1 gear which will be an issue if it does By any chance you know how to fix this?
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06-27-2017, 07:30 PM | #35 |
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Picked up my car yesterday from SouthernBM who took a good look at the problem. They upgraded the DME software to the latest version (my car is a 2013, no tune) and I'm now driving a rattle-free car.
FYI, my car sounded just like the video posted above previously. |
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06-28-2017, 09:48 AM | #36 | |
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07-03-2017, 12:23 AM | #37 |
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So any definitive answer other then airbox and normal sounds? I hear it on my car with the AA supercharger and obviously their DME tune.
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11-17-2017, 02:49 PM | #38 |
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I hate to pour gasoline onto the bonfire that is rod bearing hysteria, but my car had the exact same 'knocking' noise is the video quoted above. It could be reproduced 100% of the time by accelerating hard from 2nd or 3rd gear with the engine off-idle (aka bog the engine). the knock/ping sound would start at around 2800rpm and disappear by 3500 rpm. It first happened in September during a trip to San Francisco. I thought it was the crappy CA 91 octane gas. When i arrived home in Seattle i filled up with my normal Shell 92, but the sounds persisted. After several bad Blackstone labs reports, I had my rod bearings replaced last week and since then ( last week ) i have not been able to reproduce the noise since.. strange, eh?
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11-17-2017, 03:03 PM | #39 | |
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11-17-2017, 03:26 PM | #40 | |
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11-17-2017, 03:45 PM | #41 |
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like i said i thought it was a lean mixture or something to do with fuel delivery. If I suspected rod bearings i would not have left it for 2 months. i didn't expect the noise to go away, but it has
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11-17-2017, 03:46 PM | #42 |
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2008 E92 build date 6/08. I went from 4 ppm lead to 15 in January and then up to 30ppm in October. That's when i decided to change the bearings
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11-19-2017, 09:24 AM | #43 | |
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11-19-2017, 09:27 AM | #44 |
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