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Go Back   Bimmerfest - BMW Forums > BMW Model Discussions > X Series > X3 F25 (2011 - current)

X3 F25 (2011 - current)
The latest X3 brings some added style and some new features to the BMW SUV family. Talk about the new F25 now!

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  #1  
Old 11-24-2012, 08:55 AM
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X3emist X3emist is offline
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Anyone else with excessive carbon on exhaust tips?

On our F25 I spent 30 minutes and two types of metal/chrome polish trying to remove the baked on black carbon on the end of the exhaust tips. It would not come off. I have never experienced this problem on any of our other 3 BMW's.

Is there something about the twin tubo 4 banger? Does it run rich? I suspect an issue of some sort but do not have a CEL. Will have to take in for the shop to scan for codes I think just to be safe.

Anyone else notice this issue?
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2006 X3 Silver Grey/Black Lthr/Alum Trim/Sport Prem Pkg/Xenons/Servotronic/Prem Sound/Satellite Radio/Heated Seats/Carbon Fiber Pillars/Blue Tooth/Aux In/Cargo Net/Aluminum Pedals/V1 Hardwired
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  #2  
Old 11-24-2012, 07:02 PM
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My wife's Acura has the same mess on the exhaust tip as my x3.

No worries... It's an exhaust pipe after all.
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  #3  
Old 11-25-2012, 07:34 AM
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Yes but

Yes, but it is also an engine and it isn't supposed to blow that crap out the poppintubbin. Gonna have the dealer pull the plugs and have a look see at their condition. Something is amiss, it should not be running this rich and didn't earlier on this year after we first got it.
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  #4  
Old 11-26-2012, 09:56 PM
SpaceManGray SpaceManGray is offline
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Quote:
Originally Posted by X3emist View Post
Is there something about the twin tubo 4 banger?
I've got the same problem with the 6 cylinder. I only use 93 gasoline. So, I don't think it's anything we're doing.
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  #5  
Old 02-01-2013, 12:40 PM
Bobba Bobba is offline
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same problem 2011 x3 28i chrome tips,parts dealer option, use 91/93.. try cleaning with WD-40, be careful of overspray, better to spray on cloth, than on the black (unpainted) rear bumper.. unless chrome is pitted WD works fairly well..
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  #6  
Old 02-01-2013, 02:25 PM
farg farg is offline
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Formerly I owned an E46 M3. I kept the inside and outside of the pipes clean with Mother's Mag and Aluminum polish. Don't know if you've tried that yet. Took alittel elbow grease, but really worked for me.
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  #7  
Old 02-01-2013, 03:22 PM
wavewuver wavewuver is offline
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Quote:
Originally Posted by farg View Post
Formerly I owned an E46 M3. I kept the inside and outside of the pipes clean with Mother's Mag and Aluminum polish. Don't know if you've tried that yet. Took alittel elbow grease, but really worked for me.
My E36 M3 had solid stainless tips that were quite easy to keep clean, inside and out. However, these chrome covered tips don't clean up nearly as easy. Elbow grease and don't wait long between cleanings is my suggestion.
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  #8  
Old 02-01-2013, 09:13 PM
GTBecker GTBecker is offline
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The service manager here says this is normal, but couldn't explain why. I only see it on the right exhaust of my 2013 F25, and it wipes off very easily with a WD-40-soaked paper towel. Odd.
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  #9  
Old 02-01-2013, 09:56 PM
MINI+BMWtek MINI+BMWtek is offline
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if you pay them for removing spark plugs they will do it, they are not going to removed spark plugs for a normal condition, all exaust tips will have carbon.

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  #10  
Old 02-02-2013, 06:44 AM
wavewuver wavewuver is offline
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Quote:
Originally Posted by GTBecker View Post
The service manager here says this is normal, but couldn't explain why. I only see it on the right exhaust of my 2013 F25, and it wipes off very easily with a WD-40-soaked paper towel. Odd.
Usually one pipe carries the majority of the exhaust until you open her up some and then they both work.
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  #11  
Old 02-02-2013, 07:44 AM
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lbjgh lbjgh is offline
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Ya, that's completely normal... both the carbon and the single tip getting dirty. If you drove the car a little harder you'd see carbon on both tips.

Quote:
Originally Posted by GTBecker View Post
The service manager here says this is normal, but couldn't explain why. I only see it on the right exhaust of my 2013 F25, and it wipes off very easily with a WD-40-soaked paper towel. Odd.
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  #12  
Old 02-03-2013, 08:01 AM
poker838 poker838 is offline
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Audi 2.0t here... And I do have a lot of carbon gunk out the back. Worse on a white car as it gets all over the paint
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  #13  
Old 02-09-2013, 10:49 AM
x3r x3r is offline
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excessive carbon/soot in & on exhaust tip(s)

have had our new X3 for a month now and havwe cleaned it up a few times already. been using Nevr Dull which is fine for inside the pipe but doesn't work as well on the chrome tip where it's obvioulsy baked on there - takes some elbow grease but it eventually comes off. could this build-up be the result of the Start/Stop function (frequent starts) or the Eco Pro mode that the wife drives with constantly? i'm with ya on this....never had this problem on my old E83 X3.
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  #14  
Old 02-09-2013, 02:29 PM
glennk glennk is offline
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Not to change the subject, but what is the recommended octane for these engines? i keep seeing folks filling up on 89 to 93.
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  #15  
Old 02-10-2013, 07:58 AM
UncleJ UncleJ is offline
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Driving a new 3 series service loaner with the 28i and noticed that tail pipe gunk (at 3K miles on the clock) which in my old E83 ('06 X3) at 94K miles I do not have! Strange, must have something to do with the turbo is all I can figure.
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  #16  
Old 02-10-2013, 09:14 AM
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gfeiner gfeiner is offline
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Quote:
Originally Posted by glennk View Post
Not to change the subject, but what is the recommended octane for these engines? i keep seeing folks filling up on 89 to 93.
The manual states that 89 is the minimum and 93 is recommended.
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  #17  
Old 02-10-2013, 09:20 AM
UncleJ UncleJ is offline
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In CA the top generally available is 91, although I am informed that there are some stations that do carry a higher number octane -- but they are specialists and not the run of the mill gas stations.
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