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N51 Rough idle, whine. 2011 328i
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02-23-2021, 09:47 AM | #1 |
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N51 Rough idle, whine. 2011 328i
Hi!
I posted before about a rough idle and whine and the problem went away on its own. But, the problem has now returned and I finally have a fault code. I got a 002A82 error code for the intake vanos which would suggest a VANOS solenoid, but I read a forum where it was actually the PCV valve causing the code. So, when this happened again I did the oil filler cap test, and there was some pressure but I didn’t have to pull too hard to get the cap off, but the whine did change when I took it off. I’m hoping for it not to be the PCV as I do not want to change the valve cover, so I wanted to hear what other people thought before attempting to tackle such a job. Here’s a video of what my car is doing: View post on imgur.com |
02-23-2021, 10:29 AM | #2 |
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Check with your dealer and see if they will cover it under the SULEV warranty.
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02-23-2021, 10:51 AM | #3 |
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02-23-2021, 12:25 PM | #4 | |
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02-23-2021, 12:52 PM | #5 |
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From your video I can hear a whistling noise that could be a bad PCV valve. Does this noise go away when the engine is running with the oil cap open? If it does go away with it opened, I'd guess it's a broken PCV valve.
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02-23-2021, 02:04 PM | #6 |
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It doesn’t go away, but it definitely is a quieter. That’s why I wasn’t sure whether it’s actually the PCV valve or not.
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02-23-2021, 02:08 PM | #7 | |
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02-23-2021, 02:42 PM | #8 |
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Since you only have a fault on one of the two solenoids (one for intake and one for exhaust VANOS units), you could try cleaning and swapping them to see if the fault transfers to the exhaust side. If it does, that solenoid is probably bad (maybe even the other one too; at 130k both could be needing replacement).
Apparently bad VANOS solenoids cause a whistle too: https://www.bimmerfest.com/threads/w...g-idle.825666/ |
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02-24-2021, 10:26 PM | #10 |
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I think you can pull some strings or call BMW NA and have them maybe push to get you covered by the warranty. I know people here in Florida have had cars fixed by the dealer with sulev warranty and there's no inspections or anything here
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02-25-2021, 10:50 AM | #11 |
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03-04-2021, 01:04 PM | #12 |
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Switched VANOS intake and it fixed it for a day but then same code and problem came back. Checked oil filter cap, cage was missing Ordered new cage and replaced it, and so far sound hasn't came back and the idle is less rough but going from 1st to 2nd my car sounds like a supra l not sure that's supposed to happen but until I have another issue I'm not gonna worry
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328i, e90, n51 |
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