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General E46 Forum
This is the place to get answers, opinions and everything you need related to your E46 (sedan, coupe, convertible and wagon) BMW!

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Old 12-01-2012, 11:24 AM   #21
Nerdy46
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Pretty sure the oil had nothing to do with this issue. Rod bearings wont go like that. Your code precat 02. Id look in to an exhaust leak causing your 02 code. this does not sound like a rod knock.
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Old 12-01-2012, 11:31 AM   #22
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Thank you, your Office clip made me laugh out loud and made my day.
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Old 12-01-2012, 11:49 AM   #23
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than?
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Old 12-01-2012, 11:51 AM   #24
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Yea what they said.clearly an exhaust leak somewhere

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Old 12-01-2012, 12:13 PM   #25
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It's a rhythmical knocking sound. Have you taken off all the belts and run the engine BRIEFLY to see if the knocking remains?
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Old 12-01-2012, 12:15 PM   #26
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Quote:
Originally Posted by Stinger9 View Post
It's a rhythmical knocking sound. Have you taken off all the belts and run the engine BRIEFLY to see if the knocking remains?
no i haven taken of the belts, i should and will try that
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Old 12-01-2012, 09:00 PM   #27
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Changed oil drove about 5 miles with mobil 93 gas and castrol oil in it. Car drives fine, but unfortunately clicking noise is still there.
Question guys:
Could it be:
a)Vanos
b)Disa
c)oil level sender
d)cam shaft
here is the latest short video(47s)
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Old 12-01-2012, 09:56 PM   #28
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id say vanos or disa, try and locate area of noise.
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Old 12-01-2012, 10:08 PM   #29
ilkercatal
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I know where it comes from

Quote:
Originally Posted by 99_323i_Steve View Post
id say vanos or disa, try and locate area of noise.



Noise is coming from right under the BMW logo, Should i continue driving it while finding out the problem or just let it sit.

So whats under that BMW logo, I am guessing pistons etc.
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Old 12-01-2012, 10:14 PM   #30
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I am doubting its VANOS. Because: I dont have any of the below symptoms====

Overall loss of torque and power, particularly in the lower RPM range, < 3k. Bogging then surging at 3k RPM. Uneven power distribution and RPM transition. Engine hesitations in the lower RPM range, < 3k. Louder idle and intermittent idle RPM hiccups. Difficult takeoffs. Loss of power and bogging when AC on. Increased fuel consumption.( link==http://www.beisansystems.com/procedures/vanos_procedure.htm)
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Old 12-03-2012, 04:48 PM   #31
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so

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Originally Posted by E46Mango View Post
looks like an oxygen sensor code. could probably have a large vacuum leak as well. i've seen and heard a large vacuum leak cause a bunch of knocking noises and ruckus in an e46
Ive heard if you flush the oil or change the oil twice it would smooth out the knocking noise
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Old 12-03-2012, 10:59 PM   #32
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Ive heard if you flush the oil or change the oil twice it would smooth out the knocking noise
This might be way down on my list of things I'd believe.
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Old 12-03-2012, 11:38 PM   #33
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LOL on all of those that think changing to regular oil had something to do with it. Car engines don't benefit from synthetic oil other than extended oil change intervals. Synthetic oil was originally developed for jet engines because regular oil couldn't withstand the temperatures and pressures that turbine engines produce. Conventional car engines won't produce temps or pressures high enough to break down the lubricative properties of conventional oil. There have been numerous studies done on this.

That being said, I still put synthetic in my BMW!

A little history on synthetic oil:

http://www.oil4kids.com/syn-hist.htm
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Old 12-04-2012, 12:31 AM   #34
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I wouldn't completely discount the oil change as having something to do with this but it may have nothing to do with the oil itself, but different detergents within the oil may have broken some deposits loose.

The lifters in our m52/m54 engines are hydraulic. If any deposits lodged in the oil journal of one of the lifters it could prevent the lifter from fully pressurizing causing lifter tick. Hard to say from 2500 miles away... but a possiblity.
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Old 12-04-2012, 12:45 AM   #35
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If it were me I would try to fix whatever it is and get rid of it asap. I'm sure you don't want to be swapping engines anytime soon

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Old 12-04-2012, 09:23 AM   #36
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oil level sensor.

Add another oil bottle and see if there is any difference.
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Old 12-04-2012, 09:39 AM   #37
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oil level sensor.
Aumm what?
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Old 12-04-2012, 03:05 PM   #38
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whats oil level sensor got the do w the noise? conufed

really, i dont thnik so tough
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Old 12-04-2012, 03:10 PM   #39
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you are right on the money buddy

i WENT TO A BMW mechanic today here in brooklyn ( guy used to work at bmw factory in ermany, a russian guy)
He listened to the noise and he says 95 percent chance is the lifters. i told him will this sieze the engine, he goes i dont think so. I asked him also, how much to repair and he says 1000 to 2000 depends what is needed. So since my car is only worth like 3000$ i am just going to use it as it is and do all other maintence and live with this small noise. Or, if one of ya'll can give me a link on how to do this lifters change ( is it expensive to buy the parts, is it tedious job to do).
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Old 12-04-2012, 03:11 PM   #40
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Quote:
Originally Posted by ilkercatal View Post
i WENT TO A BMW mechanic today here in brooklyn ( guy used to work at bmw factory in ermany, a russian guy)
He listened to the noise and he says 95 percent chance is the lifters. i told him will this sieze the engine, he goes i dont think so. I asked him also, how much to repair and he says 1000 to 2000 depends what is needed. So since my car is only worth like 3000$ i am just going to use it as it is and do all other maintence and live with this small noise. Or, if one of ya'll can give me a link on how to do this lifters change ( is it expensive to buy the parts, is it tedious job to do).
also, other than the noise, car drives like 3 years old
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