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DIY: Do It Yourself
Post here to share or improve your wrench turning skills! All BMW E46 DIY tips, tales, and projects discussed inside. Learn to work on your car and know the right BMW parts you will need!

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Old 10-05-2014, 01:23 AM   #1
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Join Date: Dec 2013
Location: Burbank, CA
Posts: 65
My Ride: 2003 325ci M56
Talking Cleaning CCV on M56 SULEV engine (Its possible)

Ok, since I have received help from many people on here I figured I will try to return the favor. I started this project with the goal being changing my VANOS seals but upon removing valve cover I noticed quite a bit of crap under it mainly in the area where CCV is built in. I couldn't live with the guilt of putting it back in the shape it was in so I got brave and removed a ton of little bolts and pried off the 2 covers over the CCV. What I found was disgusting, built up junk everywhere, so I spent the next 3 hours scrubbing and spraying cleaner until it was clean again. The crap coming out of the hole where CCV is seemed like it would never end. After doing this and changing seals its like a completely different car, way more power and no more hesitation when climbing hills etc.. Im not 100% its bc I cleaned CCV or not but in my mind I feel like it helped. I will post some pics as soon as I can to show the before and after and hopefully if anyone is having CCV issues you could try this before buying an entire new valve cover. Btw im a lot better with cars than computers so I have to figure out exactly how to get pics from phone onto here lol.
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Last edited by dck8267; 10-06-2014 at 06:31 AM. Reason: to add pictures
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Old 06-29-2016, 01:01 PM   #2
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Join Date: Oct 2015
Location: Evans, GA
Posts: 1
My Ride: 2004 325Ci Coupe
Thank you for this. It was helpful to me.
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Old 07-04-2016, 07:08 PM   #3
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Join Date: Jun 2010
Location: CT
Posts: 2,067
My Ride: 2001 325i
Thanks for posting this. For those of us new to the M56 valve cover (on an M54 engine) with it's integrated CCV, this is new ground. Offhand, around how many miles did you have when you opened the CCV up to clean it?
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Old 07-09-2016, 11:23 PM   #4
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Join Date: May 2015
Location: El Paso, TX
Posts: 667
My Ride: `04 M56 Touring
Man, well written up!
just a couple days too late for me, I had mine off for VCG just the weekend before!
If I were to give my Touring Build a first name, I'd probably name it "Alan".
Mostly because I like puns.

E46 Touring TV Tuner Install/Mounting DIY
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Old 09-23-2016, 05:31 PM   #5
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Join Date: Jul 2016
Location: NY
Posts: 2
My Ride: 91 325 conv
Where did you get the pn for gasket/seals to those plates with all the screws in it, also were you able to get to the ccv on the top side, the round black plastic cap, it has I think like a rubber piece underneath that? did you replace or clean that part also...
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Old 09-25-2016, 07:35 AM   #6
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Join Date: Dec 2013
Location: Burbank, CA
Posts: 65
My Ride: 2003 325ci M56
Sorry for not responding i got a new phone and it took me forever to figure out the reason i could not log on was bc my old phone was still logged on, anyways i couldnt find the gasket so i had to reuse old one. Its been close to 40k with no issues and i just had to remove valve cover again and its just as clean 40k later. (P.O. followed bmw oil change schedule for 53k, i change oil every 3k with ll-01 approved synthetic)
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