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BMW 3-Series (E90 E92) Forum
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N54 335i engine knocking
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02-20-2015, 12:53 AM | #1 |
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N54 335i engine knocking
Any help is appreciated I've babied my car since day one this is weird 69k miles This noise happen today at cold start once the car got fully warmed up it went away I drove my car all day popping the hood to hear that same noise no noise I'm still worried this is not normal this has happened twice last service I got done was brand new oem starter and walnut blast |
02-20-2015, 08:34 AM | #3 |
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Noisy Lifters I believe, happens to mine to something to do with low oil pressure at idle and our lifters being hydraulically based. I wouldn't worry, first time I heard it was the drive through. When you rev does it go away?
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02-20-2015, 08:48 AM | #4 |
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Yes and thnx for ur reply this is a common issue I'm out of warranty yes I think it's a lifter that gets stuck
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02-20-2015, 08:50 AM | #6 |
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This is a common problem on these cars the good thing that it goes away lifter stuck maybe could be a lot of things I'm driving my car until it breaks down hopefully not soon but after watching a lot of videos online this is a common issue damn Bmw is never ending warranty or not
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02-20-2015, 08:55 AM | #7 |
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I've fully rev engine I've kept it at different rpms engine is good this engine strong but this noise worries me sound like the motor is going to give out oh well at least it goes away for now I guess crossing fingers
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02-20-2015, 09:31 AM | #8 |
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You'll be fine. Theres nothing that links this issue to any kind of engine damage or engine breakdown as of yet. Mine is intermittent its happened like 3 times since I've owned the car. Just drive and don't worry about it, these engines are full of weird noises.
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02-20-2015, 11:18 AM | #9 | |
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02-20-2015, 11:26 AM | #10 |
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That is quite common. It may be related to cam bearing ledges but if it is and it gets bad you'll get a code and will need to take the valve cover off to replace them. Cam bearing ledges are a very common issue on the N54 with mileage. BMW's changed the part number on the small rectangring that relates to oil pressure doing VANOS control.
Take a look here for a DIY: http://www.e90post.com/forums/showthread.php?p=17374960
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02-20-2015, 11:37 AM | #11 | |
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You probably meant: Cam bearing ledges are NOT a very common issue!
mainly because cam bearing ledges noise doesn't go away when reeving and usually implies codes. @EvlShiftrE92: I would do an oil sample analysis just to make sure nothing else is going on. I have the same noise. If i drive spirited it goes away but it comes back as soon as I drive in stop an go traffic the day before. There's a procedure around here about how to get air free oil on those lifters but i cant find it now. I think there's an updated head for N54 but it doesn't fixes the issue. Quote:
Last edited by v1rus; 02-20-2015 at 11:42 AM.. |
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02-20-2015, 11:39 AM | #12 | |
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Once you start getting 2A82 codes and it doesn't go away with VANOS solenoid replacement you know where to look next
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02-20-2015, 11:46 AM | #13 | |
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I do IT and that's how i scare my customers too
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02-20-2015, 12:14 PM | #14 |
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EVAP SOLENOID! how many times do we need to go through this
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02-20-2015, 12:57 PM | #17 | |
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#13907618652
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02-20-2015, 01:07 PM | #18 | |
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02-20-2015, 01:12 PM | #19 | |
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02-21-2015, 12:24 AM | #21 |
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ok this isn't the same as OP.
ive had this same exact sound. dealer replaced solenoid on one of my turbos and said it was getting stuck. the tech said he used a stethoscope and heard it. it didn't affect drivability at all or throw any codes.. the problem is now fixed i would usually hear it when the car is fully warmed up after a drive as i let the car idle. it would sound for about 10 sec and go away on its own or if i blip the throttle. other ppl on the forum say its a noisy evap valve or something of that sort and not to worry. it sounds nasty though. |
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02-21-2015, 12:27 AM | #22 |
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