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BMW 3-Series (E90 E92) Forum
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DIY: Charcoal filter removal
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06-04-2006, 06:10 PM | #1 |
Handy Armani
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DIY: Charcoal filter removal
I have been reading the discussion in this thread (http://e90post.com/forums/showthread...=carbon+filter) for a while. Since no one post DIY yet, I decided to do it myself.
Here you go. |
06-04-2006, 06:14 PM | #6 |
Handy Armani
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Step 5
Use a small flat head screw driver to release intake sensor from the intake box
and loosen the clamp screw on the flexible tubing |
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06-04-2006, 06:26 PM | #14 |
Handy Armani
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Post removal:
I found the engine runs smoother and revs faster. The hesitation between 1500 to 3000rpm is greatly reduced to none. The engine sounds a bit more clear and (just a bit) louder under heavy acceleration. Last edited by adr; 06-07-2006 at 12:48 AM.. |
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06-06-2006, 09:40 PM | #18 | |
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06-06-2006, 10:28 PM | #19 | |
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06-06-2006, 10:40 PM | #20 |
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You have to clean it based on where you live. If you live in a dusty area you will have to clean it more. Maybe inspect every 7-10k. The oil solution used to trap particles can and will get dirty so clean or inspect every now and then. Your filter should look pink and if it is no longer pink, then you need to go and get a recharge kit from any auto store and clean it. Just make sure not to over spray the final solution or you can damage the MAP sensor. People have this problem all the time so be careful.
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10-05-2006, 08:31 AM | #21 |
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After doing this DIY, I have added an observation. Once you cut the filter out there is a very rough syrface, and it's COVERED in black charcaol dust.
I removed the MAF sensor from the airbox.( Just two #20 tork screws) BE CAREFUL with this part, it's fragile!! Then I used a dremel to smooth all the rough edges. Sandpaper will work too, but a dremel is faster. Whether using sandaper or dremel it will create a TON of dust. I then washed the entire airbox, and let it dry completely. (this is why I removed the MAF sensor) It's an easy mod, and the combination of adding a K&N filter, plus this mod, added a very noticeable improvement in throttle response, trust me. As for HP, probably not much, but it's still worth doing since down the road having that stupid charcoal filter in there will definitely cause airflow restriction since it's not replaceable!! It's almost like having two air filters, a poor design IMO. But, I guess a few states (CA for example) were concerned with vapors escaping into their precious atmosphere when the vehicle is turned off!? We have greater air concerns, believe me! OK, off my soap-box. Last edited by JIMD1709; 10-05-2006 at 08:57 AM.. |
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10-06-2006, 12:12 AM | #22 |
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Thanks for DIY....very detailed and straight forward!!!
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