Author Topic: B7 Carbon Clean  (Read 16408 times)

0 Members and 1 Guest are viewing this topic.

Albacol

  • Guest
B7 Carbon Clean
« on: August 27, 2012, 10:00:41 am »
A non-poster but lurker here did his B7 at the weekend. It had done 115kms and the pictures were quite impressively bad - absoluteyl caked with Carbon. He cleaned it all out and came back to me to tell me that it was like night and day. I've been pondering about it so now am motivated to get it done - anyone had it done and got a ballpark cost ? His took him 15hrs as a numpty, i've seen 8-10 quoted elsehwere. I'll call Powerhaus and see if they have done any but any experiences welcomed.

Offline RS ZWEI

  • Administrator
  • ####
  • *****
  • Posts: 19233
    • http://www.vask.org.nz
Re: B7 Carbon Clean
« Reply #1 on: August 27, 2012, 10:23:57 am »
Im guessing youre meanting a B7 RS4?
1980 VW Golf GTI Track Car
1995 Audi RS2
2003 Mini Cooper S
2006 Skoda Octavia vRS Combi
2009 Renault Megane 230 R26

Offline CBRT

  • ##
  • **
  • Posts: 3895
Re: B7 Carbon Clean
« Reply #2 on: August 27, 2012, 10:29:30 am »
get him to post up his pics.....
2013 MK7 GTI
2003 Audi RS6 Avant

Albacol

  • Guest
Re: B7 Carbon Clean
« Reply #3 on: August 27, 2012, 10:44:59 am »
Sorry yes B7 RS4.

I'll get the pics posted.

Offline joemurf

  • Posts: 10
Re: B7 Carbon Clean
« Reply #4 on: August 27, 2012, 09:52:02 pm »
After many hours spent reading various forums on B7 RS4 and FSI-based engine carbon build-up; rs246.com, audizine.com, VASK, I decided to take the plunge and see if my RS4 was affected.

I haven't had any pinking or misfiring, no error codes or warning lights, fuel economy seemed okay.  Exhaust flaps opened/closed with the 'S' button [e.g. vacuum system worked].  There was even a wee kick in from 5500 rpm.  But the reason behind wanting to do this was the car just felt a bit flat overall, it always had been.

So, check out the pics of my wee discovery..

First two pics are the port baffles

Offline joemurf

  • Posts: 10
Re: B7 Carbon Clean
« Reply #5 on: August 27, 2012, 09:56:24 pm »
Valves

Offline joemurf

  • Posts: 10
Re: B7 Carbon Clean
« Reply #6 on: August 27, 2012, 09:59:34 pm »
Another valve, and looking back up the intake manifold. The intake flaps were pretty clean really.

Offline joemurf

  • Posts: 10
Re: B7 Carbon Clean
« Reply #7 on: August 27, 2012, 10:01:00 pm »
Post clean

Offline joemurf

  • Posts: 10
Re: B7 Carbon Clean
« Reply #8 on: August 27, 2012, 10:02:29 pm »
Baffles back in

Offline 00quattro00

  • ###
  • ***
  • Posts: 5326
Re: B7 Carbon Clean
« Reply #9 on: August 27, 2012, 10:04:16 pm »
Damn they get carboned, what did you use to clean it and how long did it take?
Land Rover Discovery 300tdi
Land Rover 110 4bd1t

Offline CBRT

  • ##
  • **
  • Posts: 3895
Re: B7 Carbon Clean
« Reply #10 on: August 27, 2012, 10:05:29 pm »
Wow looks crappy......
2013 MK7 GTI
2003 Audi RS6 Avant

Offline joemurf

  • Posts: 10
Re: B7 Carbon Clean
« Reply #11 on: August 27, 2012, 10:10:50 pm »
After a handful of outings I'm happy to report the improvement is immense.  The car feels lighter and more fresh, the power far more readily available in low and high rpm, and the surge through 5500 rpm much, much stronger. Well worth the effort.

Offline joemurf

  • Posts: 10
Re: B7 Carbon Clean
« Reply #12 on: August 27, 2012, 10:24:30 pm »
Took about 14-15 hours all up.  3 hours to get manifold off, about an hour per cylinder and a couple of hours back together.

Basically, scraped most of the build up off with a scraper/pick and vacuumed. Then Dremel with a stainless wire brush attachment for the remainder, and vacuumed again. Wynn's DIP3 aerosol to dissolve the dust residue and a rag.  Will run another can of DIP3 through in a few days to clear out any other residue.  I imagine any carby cleaner would work to dissolve the dust, some of the guys on UK forums I read said they had results with the DIP3 so figured it was worth a shot.

Offline M

  • #
  • *
  • Posts: 2324
Re: B7 Carbon Clean
« Reply #13 on: August 28, 2012, 07:20:09 am »
I have driven a few B7's that are "flat" now and almost certainly related to this, but unless the customer complains of it being flat it's hard to tell them that their RS4 feels slow....  ;D
Too much power is almost enough.

____________________________________________

Albacol

  • Guest
Re: B7 Carbon Clean
« Reply #14 on: August 28, 2012, 07:39:32 am »
Try getting a dealer to do anything about it under warranty. "hello my car feels quite flat" " that's nice dear"

Offline beeker

  • ###
  • ***
  • Posts: 5188
Re: B7 Carbon Clean
« Reply #15 on: August 28, 2012, 08:01:10 am »
Try getting a dealer to do anything about it under warranty. "hello my car feels quite flat" " that's nice dear"

I did, then backed it up with a dyno, and then had them carbon clean it under warranty :)
14 RS6 Avant Black
09 Q7 4.2 TDI
93 E36 M3 Targa Car
94 DC2 Integra Targa/Track Race Car

Offline the phantom

  • ##
  • **
  • Posts: 3294
Re: B7 Carbon Clean
« Reply #16 on: August 28, 2012, 01:20:43 pm »
if only air is going down the inlet tract, that junk must be from blow back from the cylinder
Land Transport New Zealand, taking the fun out of driving since August 2008

Offline nordschleife

  • #
  • *
  • Posts: 1019
Re: B7 Carbon Clean
« Reply #17 on: August 28, 2012, 07:56:10 pm »
Thanks for posting this up - it is the worst I have seen.

It's a shame there isn't a before and after dyno run for this.  It will have had a massive effect on performance.
VW Golf GTI - Track Car
VW Golf GTI - Road Car
BMW ///M5 - Previous Car and looking for another - F10 LCI
Octavia vRS Combi - Wife's Car
VW Golf R32 - Sold

Offline joemurf

  • Posts: 10
Re: B7 Carbon Clean
« Reply #18 on: August 28, 2012, 10:48:04 pm »
No worries. Yea it looks bad, but I think it's pretty typical of what a lot of people see.  I did a fair bit of reading on it before deciding to do it and there are as many opinions against it being an issue, as for it.   This guys story was interesting [with pics and before/after dynos].

http://www.audizine.com/forum/showthread.php/322587-RS4-only-263whp-flat-from-6k-rpm-!-!

And these two:

http://www.audizine.com/forum/showthread.php/297492-My-RS4-under-the-knife
http://www.audizine.com/forum/showthread.php/334489-RS4-Intake-Manifold-Carbon-Build-Up-amp-Clean-Up

The often posed theory is it's caused by blow back, but in mine there was a lot of wet oil residue within the inlet manifold which to me seemed unlikely to be related to just blow-back.   Possibly the crankcase ventilation system is also contributing by passing in some oil rich air? Some of those posts are 15 pages long with all sorts of theories [the way you drive/the way you don't, the oil, the fuel, catch cans, additives, servicing].  One guy even had bad build-up, cleaned it, and couldn't tell the difference...

And then there is the FSI megathread.  A lot of the guys in the US seem to have tried to take issue with Audi USA to get something sorted.

http://www.audizine.com/forum/showthread.php/336352-Audi-FSI-Engine-Carbon-Build-up-Megathread

I recon in the end try and drive a few for comparison, and if yours feels 'flatter' than the rest, get it cleaned.

Offline RS ZWEI

  • Administrator
  • ####
  • *****
  • Posts: 19233
    • http://www.vask.org.nz
Re: B7 Carbon Clean
« Reply #19 on: August 29, 2012, 07:02:42 am »
Honestly, this would put me off B7 RS4 ownership.
1980 VW Golf GTI Track Car
1995 Audi RS2
2003 Mini Cooper S
2006 Skoda Octavia vRS Combi
2009 Renault Megane 230 R26