05-03-2018, 07:36 PM | #1 |
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WOT vibration above 4krpm
Anyone else have some minor vibration through the steering wheel and chassis over around 3 to 4krpm and above? Just got my break in service done and finally floored the pedal. Repeated pulls showed a little bit of vibration which creeps in until I shift. Is this just characteristic of this car or do I have an issue? Not sure what that would be.. motor mounts or something?
They put brand new tires on (unused summers on finally) and it's fine when coasting so it's not balance related. edit: it's definitely an overboost related vibration. Only occurs on max boost, and doesn't really seem evident when overboost is in cooldown.
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Last edited by stefan; 05-05-2018 at 11:13 AM.. |
05-15-2018, 05:13 PM | #3 |
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no such issue here
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05-15-2018, 07:30 PM | #4 |
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Pretty obvious now. 100kmph, sport mode, floor it in 4th.. pretty obvious. Going to BMW on Friday to determine. Wonder if a crappy charge pipe can do this?
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05-16-2018, 12:37 PM | #5 |
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thats what i was going to suggest, just replace that POS pipe because even if its slightly cracked the useless dealership would not notice
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05-16-2018, 11:15 PM | #7 |
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Apparently cracks at the seam near the c-clip. This is only supposed to happen on tuned cars but who knows. We will (hopefully) find out on Friday.
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05-18-2018, 04:51 PM | #8 |
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BMW checked it out. They agreed that there was a problem but couldn't determine the fault (!!) and no error codes were logged.
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Last edited by stefan; 07-24-2018 at 08:35 PM.. |
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05-18-2018, 06:55 PM | #10 |
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Nothing at all they just wanted me out of there because it was Friday. Gotta phone and make an appointment and start all over again with a long wait.
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05-23-2018, 09:10 PM | #12 |
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So far nothing.. just wrote to the service manager and will go from there. Maybe you can let me know what you find out on your end?
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05-23-2018, 10:11 PM | #13 | |
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Im planning on taking it to my BMW race shop for review, but I wont be there for a few weeks. |
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05-23-2018, 10:27 PM | #14 |
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I suspect a crap trans or motor mount at this point. Would prefer if they just replaced them--cheap things to eliminate first. I suspect if I had mods they would blame it on that but who knows.
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Last edited by stefan; 07-24-2018 at 08:35 PM.. |
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05-24-2018, 06:51 AM | #15 | |
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05-24-2018, 07:45 AM | #16 | ||
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05-24-2018, 06:35 PM | #18 | |
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05-24-2018, 08:18 PM | #19 | |
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05-24-2018, 08:20 PM | #20 | |
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Hmm so we have different exhausts but perhaps it is some kind of resonance. Thing is though I can feel it in the wheel as well.
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05-24-2018, 08:35 PM | #21 |
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05-30-2018, 04:41 PM | #22 |
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Update; they sent me on my way again. Said it was normal. They seem to be convinced its road conditions. Chatted with an M2 owner who is also a service advisor and he has the same issue. None of this stuff was captured in notes of course but it is interesting. He is suspicious of it being the exhaust. Given how aggressive MPE is, it could be that it's just vibrating at the headers. I'd buy that.
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