Carbon build up on exhaust tips

Reply Subscribe

Thread Tools

Search this Thread

May 28, 2018 | 05:09 AM

02fanatic

Thread Starter

6th Gear

Joined: Nov 2015

Posts: 1,161

Likes: 105

Carbon build up on exhaust tips

Been looking at 2015 CMS All4’s and almost all of them have crusty black & dingy looking exhaust tips. Most of these cars are likely one owner or lease cars as they only have between 25k & 30k miles.

Is this something to be concerned about? I’m not familiar with the Prince N18 engine but is this typical?

May 29, 2018 | 02:36 PM

02fanatic

Thread Starter

6th Gear

Joined: Nov 2015

Posts: 1,161

Likes: 105

Nobody?

May 29, 2018 | 03:07 PM

vetsvette

Moderator

iTrader: (5)

Joined: Oct 2013

Posts: 3,896

Likes: 453

From: South Central Virginia

It's not just the CM doing this. They all do, even the F series.

May 29, 2018 | 03:19 PM

02fanatic

Thread Starter

6th Gear

Joined: Nov 2015

Posts: 1,161

Likes: 105

Well, that won’t be the case for my MINI....obviously, all it takes is a bit of effort keeping the exhaust tips clean! Good to know however that this is typical for turbocharged cars.

May 29, 2018 | 05:32 PM

Dave.O

4th Gear

Joined: Oct 2007

Posts: 512

Likes: 53

From: West Chester PA

Quad 0000 steel wool after every wash make quick work of any build up.

Good Detailer’s do that, Auto car washes don’t .

Jun 8, 2018 | 02:57 PM

2cati

2nd Gear

Joined: May 2018

Posts: 128

Likes: 9

Using steel wool on the exhaust tip isn’t a good idea - rust will eventually start.

this my tip with 61k miles.

I recently bought the car and thought a simple run down with chrome cleaner would work. It didn’t.

Jun 8, 2018 | 04:17 PM

DneprDave

6th Gear

Joined: May 2010

Posts: 3,260

Likes: 87

From: Pacific NW

They all do that, when the engine is cold, the Engine Control Unit adds extra fuel until the engine warms up. This shows up as soot on the exhaust tips. I just wipe it off with a rag, I have never had a stubborn deposit on my exhaust tips. Maybe it's because they don't salt the roads around here.

Trending Topics

Clutch pedal was on the floor, couldn't get out of gear

16

303
Clutch Choices for an n18 model

26

432
What did you do to your mini today?

23.9k

3.9M
Mini Relay Clicking

40

49.4k
P0128 Help

7

159

Jun 8, 2018 | 04:28 PM

2cati

2nd Gear

Joined: May 2018

Posts: 128

Likes: 9

I admire your confidence “just wipe it off”...

it doesn’t wipe off. - it’s like baked on carbon that has to be desolved or chipped off.

Jun 8, 2018 | 05:22 PM

02fanatic

Thread Starter

6th Gear

Joined: Nov 2015

Posts: 1,161

Likes: 105

Well then, why not simply install new tips? Any reason that won't work (welded on?)

Jun 8, 2018 | 06:47 PM

#10

vetsvette

Moderator

iTrader: (5)

Joined: Oct 2013

Posts: 3,896

Likes: 453

From: South Central Virginia

0000 steel wool won’t hurt them. I use the stuff to clean glass. Also use it to remove surface rust from blued steel of rifles and pistols.

Jun 9, 2018 | 01:25 PM

#11

MrGrumpy

6th Gear

Joined: May 2018

Posts: 1,361

Likes: 246

From: Washington state

Quote:

Originally Posted by vetsvette

0000 steel wool won’t hurt them. I use the stuff to clean glass. Also use it to remove surface rust from blued steel of rifles and pistols.

thanks, I’ll try this, mine are all carboned up as well, it really bugs me....although at this point, they pretty much look like black exhaust tips which actually looks pretty good with the Lt. Coffee/Carbon Black paint. Ha ha

Jun 9, 2018 | 03:16 PM

#12

Dave.O

4th Gear

Joined: Oct 2007

Posts: 512

Likes: 53

From: West Chester PA

Quote:

Originally Posted by 2cati

No, they will not rust they are stainless steel. Your tips have not been taken care of and are ruined. You can buy new tips at the dealership, just tell them you need “beer can” tips.

I detail cars and know what I am taliking about. If you take care of your car and ceramic coat the tips the carbon washes right off at wash time.

All MINI’s have black tips because they are tuned to run rich and that helps provide the “burple” sound when you back off the gas.

Jun 10, 2018 | 10:57 AM

#13

TVPostSound

6th Gear

iTrader: (4)

Joined: Mar 2014

Posts: 2,716

Likes: 539

From: Granada Hills, CA

Quote:

Originally Posted by Dave.O

It is a known fact NOT to use steel wool on SS. It is the steel from the steel wool that embeds and rusts.

Barkeepers friend is the best to use on SS.

Jun 12, 2018 | 05:43 AM

#14

njaremka

Alliance Member

Joined: Jul 2016

Posts: 7,504

Likes: 2,480

From: WNY

This stuff does wonders for the exhaust tips:
http://www.ceramabryte.com/products/...oktop-Cleaner/

Wipe on and off. Very easy. Can be purchased at Home Depot / Lowes.