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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 03-05-2007, 04:16 PM   #1
K2Elmore
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Filthy K&N Filter

As a warning, do not try to go the full length of time that K&N says there filters are good for. I put about 25,000 on mine and went to check it today b/f an upcoming road trip and dang if it didnt look like it had been dipped in black mud. Now i am gonna have to a cheap one and clean the K&N.

Anybody ever cleaned one? I have heard horror stories about using too much oil and ruining the Mass airflow sensor. Dont want that.
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Old 03-05-2007, 04:44 PM   #2
Mikaly
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Just get the "recharge kit" from K&N. I got mine from autozone <$15.

After you clean it, just spray the oil on evenly and you should be fine. Not difficult at all! (Just frustrating get all the grime out.)
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Old 03-05-2007, 04:47 PM   #3
Philbert
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I've used them on my truck (47,000 miles since I put it on) and my 87 325es (I got 30,000 out of that before I sold it. No problems with either. you just need to clean it with the recharge kit - flush with water - dry it - and apply oil evenly. Just be careful and patient with the oil - better too little than too much.
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Old 03-05-2007, 06:08 PM   #4
smokedOUTbimmer
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Give your filter a blowjob!

....

By that I mean blow all the dirt and **** out with compressed air.
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Old 03-05-2007, 07:08 PM   #5
ezg2
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I'm pretty sure that K&N filters say NOT to used compressed air to clean them out.
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Old 03-05-2007, 07:35 PM   #6
ThaHooch
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Anyone know if Dinan has a "recharge" kit for their filters or can you use K&N's?
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Old 03-05-2007, 08:22 PM   #7
swordsman11868
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use the k&n kit to clean all the aftermarket oiled filters.
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Old 03-05-2007, 10:47 PM   #8
curious_george
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I am still a little curious about the use of these. I tend to subscribe to most of Mike Miller's (Bimmer Mag) rants(read: advice) and he has said multiple times that these things are more of a problem than a solution. Does anyone else feel that way? His overall stance seems to be that they may let more air in, but do not filter as good as a paper element and are introducing damaging particulates into the engine. I recognize that this may not matter to those who adopt the "I am going to sell it before it breaks anyway" crowd, but what about the more principled folks? Any thoughts?
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Old 03-05-2007, 11:03 PM   #9
J.DoubleU.O.
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Quote:
Originally Posted by Mikaly View Post
Just get the "recharge kit" from K&N. I got mine from autozone <$15.

After you clean it, just spray the oil on evenly and you should be fine. Not difficult at all! (Just frustrating get all the grime out.)
Word. I used the K&N recharge kit on my ECIS intake and I had no problems. Just the directions, it tells you what to do.
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Old 03-06-2007, 12:07 AM   #10
Zipp02I
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You shouldn't be worried about too much dirt getting into the engine because our stock air intakes do not force as much air as the aftermarket intakes.
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Old 03-06-2007, 12:20 AM   #11
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Originally Posted by Zipp02I View Post
You shouldn't be worried about too much dirt getting into the engine because our stock air intakes do not force as much air as the aftermarket intakes.


The whole reason he started this thread is because he has a K&N filter - not OEM.

I don't get it (your reply)?
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Old 03-06-2007, 12:35 AM   #12
Philbert
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Quote:
Originally Posted by Zipp02I View Post
You shouldn't be worried about too much dirt getting into the engine because our stock air intakes do not force as much air as the aftermarket intakes.


The whole reason he started this thread is because he has a K&N filter - not OEM.

I don't get it (your reply)?
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Considering selling 2002 M3 Convertible (~38,000 miles) this year (don't drive it enough...). If seriously interested, PM me. SF Bay area.
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Old 03-06-2007, 05:50 AM   #13
kaluahjeff
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Buy a new K&N.
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Old 03-06-2007, 09:09 AM   #14
wrighterjw10
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Cleaning is sooooooooo easy with the cleaning kit. A buddy of mine works for Richard Petty racing and has raced on dirt his whole life. Tests have been done and a dirty K&N filter doesnt effect performace too much, not even enough to change the hp gains.
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Old 04-03-2007, 08:47 PM   #15
K2Elmore
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I did get a new K&N b/c of the hole in the rubber gasket. However, the day it took for the new kn to come I had a Mann filter and I swear it made the engine feel stronger. Especially in the low end torq area. not sure, but just my 2 cents.

Getting ready for some Dinan step and engine software. Probably on thursday
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Old 04-03-2007, 09:06 PM   #16
curious_george
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Quote:
Originally Posted by smokedOUTbimmer View Post
Give your filter a blowjob!

....

By that I mean blow all the dirt and **** out with compressed air.
You are basically telling him to ruin his filter.
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Old 04-04-2007, 01:54 PM   #17
Philbert
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Quote:
Originally Posted by curious_george View Post
I am still a little curious about the use of these. I tend to subscribe to most of Mike Miller's (Bimmer Mag) rants(read: advice) and he has said multiple times that these things are more of a problem than a solution. Does anyone else feel that way? His overall stance seems to be that they may let more air in, but do not filter as good as a paper element and are introducing damaging particulates into the engine. I recognize that this may not matter to those who adopt the "I am going to sell it before it breaks anyway" crowd, but what about the more principled folks? Any thoughts?
All I know is that I got almost 80,000 trouble free miles so far from K&N solutions, and I plan to keep my truck well beyond its 247,000 miles, and will continue to depend on the K&N currently in there since 200,000 miles.
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Dinan S. | Clears | DiCE | OEM Alarm Retrofit | ACS Rep. Peds | DDEs

My Valentine 1 Hardwire | Remote Display Gauge Cluster Mod


Considering selling 2002 M3 Convertible (~38,000 miles) this year (don't drive it enough...). If seriously interested, PM me. SF Bay area.
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