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BMW 3-Series (E90 E92) Forum
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Vanos rattling, no codes - big problem?
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09-09-2020, 02:03 PM | #1 |
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Vanos rattling, no codes - big problem?
Hello,
after solving the problem with inconstant acceleration there is now the next problem comming up. between ~1300rpm and ~1800rpm there is a metallic rattling (possible to described like marbles in a can ) from the engine noticable with open windows and clos to other things like cars or walls. currently no fault codes since 2k miles and the engine seems works fine despite a little rough idle ~5 seconds after start after disconnecting the vanos solenoids it's quiet, so it must be the vanos is this just a "cosmetic issue" as long there is no code or is a soon fix needed? |
09-10-2020, 01:15 AM | #4 |
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it doesen't sound like the DISA, it's more a metallic rasp noise like a loose sheet metal from the exhaust
plus - both DISA are new i tried a Video but it's difficult, mostly the wind noise overlapped it |
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09-10-2020, 03:23 PM | #5 | |
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Quote:
https://www.reddit.com/r/BmwTech/com...tm_name=iossmf |
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09-11-2020, 01:44 AM | #6 | |
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no, my rattling/rasping it different
it's directly connected to the rpm of the engine and with an higher frequency and it's only while driving , while rving up the engine it's only for a very very short moment Quote:
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10-15-2020, 06:38 AM | #7 |
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Does anyone else have an idea?
here my thoughts on this rattle: I think it comes from the Vanos because it doesn't rattle when the Vanos valves are disconnected I don't think it's from the Valvetronic because it stays the same with different pedal positions (maybe someone here in the forum knows whether the Valvtronic is also deactivated in LIMP mode as soon as the Vanos valves are unplugged) a mechanical defect (spring in the adjuster or similar) should always rattle (e.g. VW or Mercedes adjuster) The effect on the adjustment cannot be too strong, since there are no error codes I found a lot of carbon crumbs on the vanos filters, maybe other oil ducts or bores are dirty and under certain conditions the oil pressure in the adjuster is not enough ... |
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10-15-2020, 12:12 PM | #8 |
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Hard to say without a little more detail. If you could isolate the sound to a region of the engine bay that would help. Possible that the cats are falling apart, but again, that's just a guess without more info.
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10-16-2020, 01:32 AM | #10 |
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i know it's very difficult with this little details, i was hoping someone had have a similar issue before.
it's hard to percise the location of the rattling or make a video because it's only while driving mainly uphill it's not noticable while reving up the engine when the car stand it can be also described like the sound of an old TDI disel engine, and it's only when i accelerate in this rpm range can i check the vanos hub bolts without removing the valvecover? i remember when i replaced the eccentric shaft senor all of them looked correctly seated Last edited by Robin427; 10-19-2020 at 01:21 AM.. |
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05-14-2024, 08:31 AM | #11 | |
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Hey man, have you found a solution for this? I'm experiencing a similar issue when in higher RPM. Rattling and all. Thanks! |
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