Author Topic: B7 Carbon Clean  (Read 18607 times)

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Offline beeker

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Re: B7 Carbon Clean
« Reply #60 on: December 10, 2014, 09:36:19 pm »
Does anyone know if the B8 RS4 has the same carbon build-up problems?
I assume yes?
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Offline ziptie.nz

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Re: B7 Carbon Clean
« Reply #61 on: December 10, 2014, 10:11:14 pm »
Does anyone know if the B8 RS4 has the same carbon build-up problems?
I assume yes?

Any thing with Direct injection will have carbon build up issues.

unless of course they have implemented an additional manifold injector...

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Offline beeker

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Re: B7 Carbon Clean
« Reply #62 on: December 11, 2014, 06:08:12 am »
Any thing with Direct injection will have carbon build up issues.

unless of course they have implemented an additional manifold injector...

yes and no.
I believe lexus has done that on some of their cars.
I also understand that tuned valve timing for overlap can make a big difference too.
Same with the valve metal types and coatings, there was research on this to make them less attractive to carbon sticking.
All theoretical, and I wonder if they did anything to address the issue on the b8.
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Offline Stickman

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Re: B7 Carbon Clean
« Reply #63 on: December 11, 2014, 12:29:23 pm »
You do have to say that the likely hood is high that the B8 will suffer the same issues. My B7 has 74,000kms on it and the build up was not huge. Enough to choke it up a tad, but not enough that I would do it before another 74,000kms have passed. Maybe some cars suffer more than others?
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Offline beeker

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Re: B7 Carbon Clean
« Reply #64 on: December 11, 2014, 03:23:17 pm »
You do have to say that the likely hood is high that the B8 will suffer the same issues. My B7 has 74,000kms on it and the build up was not huge. Enough to choke it up a tad, but not enough that I would do it before another 74,000kms have passed. Maybe some cars suffer more than others?

The UK say that I clean every 12 months or 10,000miles is recommended and noticeable!

Mine just had another clean, and even though its only been 18months since the prior, the difference is noticeable. 5500rpm yeha.
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Offline Stickman

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Re: B7 Carbon Clean
« Reply #65 on: December 11, 2014, 06:22:17 pm »
The thing is, they are such a great motor and otherwise are so damn reliable for a high revving V8 that I will very happily budget $1500 or so for an annual / biannual carbon clean. A minor flaw in what is an outstanding package for a car. I have toyed several times this year with upgrading to a B8 but can't get over just how happy I am with the B7. Even if I could direct swap my B7 for a B8 I don't think that I would.
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Offline subieboy

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Re: B7 Carbon Clean
« Reply #66 on: December 11, 2014, 11:00:12 pm »
Subaru's are well known for this, Subaru even have a product that is made for them and used on service intervals to help combat the carbon build up. The same product is available via Holden dealers (for the LS1/LS2 series V8 engines)

It is called "Upper Engine Cleaner" costs about $12 a can or there abouts. the smokes like a bitch for a little while then runs nicely.

Offline S1

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Re: B7 Carbon Clean
« Reply #67 on: February 25, 2015, 11:29:15 am »
Mine seems to be burning some oil now , is this happened to anybody else ?
whats broken this week , hold on ill get my wallet

Offline beeker

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Re: B7 Carbon Clean
« Reply #68 on: February 25, 2015, 12:25:44 pm »
Mine seems to be burning some oil now , is this happened to anybody else ?

All B5 and B7's RS4's burn oil. Even when brand new. Quite normal.
How much are you talking?
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Offline Stickman

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Re: B7 Carbon Clean
« Reply #69 on: February 25, 2015, 01:46:14 pm »
All B5 and B7's RS4's burn oil. Even when brand new. Quite normal.
How much are you talking?
I seem to burn 1 litre per circa 5000kms or so. Hard to tell, I drive the RS so little... :o
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Offline S1

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Re: B7 Carbon Clean
« Reply #70 on: March 01, 2015, 07:46:42 am »
I seem to burn 1 litre per circa 5000kms or so. Hard to tell, I drive the RS so little... :o

Oh ok , The B5 burns no oil but I dont drive the B7 much anymore and I have only just noticted it
whats broken this week , hold on ill get my wallet

Offline le mans

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B7 Carbon Clean
« Reply #71 on: March 02, 2015, 02:14:02 pm »
My B5 doesn't burn much - maybe 1L per year (10,000ish km).
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Offline waxer

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Re: B7 Carbon Clean
« Reply #72 on: March 27, 2015, 03:33:19 pm »
Does anyone know what sort of interval the carbon clean is required?  Mine was done about a year ago and at the recent services at giltraps, they inspected it and said it has quite bad carbon build up.  after a year?  admittedly much of my driving has been short distances but 12 months / 15,000kms?  cheers

Offline beeker

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Re: B7 Carbon Clean
« Reply #73 on: March 27, 2015, 05:22:17 pm »
Does anyone know what sort of interval the carbon clean is required?  Mine was done about a year ago and at the recent services at giltraps, they inspected it and said it has quite bad carbon build up.  after a year?  admittedly much of my driving has been short distances but 12 months / 15,000kms?  cheers

There is no specific timeline, but the ''perfectionist'' would do it every 12 months / 15k, or it would be ''good'' to do it every 24months 30k.
Else ignore and never do it (not officially required unless you have an issue appear).

You'll start to notice it on the bum dyno anywhere past 12months/15k kms, but it does creep up unnoticed unless you drive a recently cleaned car to compare it too
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Offline jaimzthedrummer

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Re: B7 Carbon Clean
« Reply #74 on: September 12, 2015, 06:36:34 pm »
Hi all,

I know little about this, but was talking to a dealer today about a B7 RS4. Said it had been carbon cleaned by a mobile serviceman... who used a nitrogen injection process? Cost was around $150...

Is this process well known? What are the drawbacks deficiencies compared to a $1500 job shown earlier in this thread?

James :-)
Current: 07 Audi RS4, 07 Audi S6, 94 BMW M3, 92 BMW 318is (race car), 04 Honda Odyssey
Past: 91 Ford Laser GT-X, 98 Mitsubishi Legnum VR-4, 04 Subaru Legacy GT WR Edition, 93 Nissan Skyline GT-R

Offline Stickman

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Re: B7 Carbon Clean
« Reply #75 on: September 14, 2015, 11:09:01 pm »
Hi all,

I know little about this, but was talking to a dealer today about a B7 RS4. Said it had been carbon cleaned by a mobile serviceman... who used a nitrogen injection process? Cost was around $150...

Is this process well known? What are the drawbacks deficiencies compared to a $1500 job shown earlier in this thread?

James :-)

Never heard of nitrogen injection...not sure on why that would specifically work...Google?
I like fast toys.

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Offline BLK-RS4

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Re: B7 Carbon Clean
« Reply #76 on: September 15, 2015, 08:39:14 am »
It may get rid of some of the sticky oily stuff but I doubt it will remove the hard backed on carbon. The only way to remove that is to either soak in chemicals and scrape off or media blast(walnut shells etc)
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Offline jaimzthedrummer

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Re: B7 Carbon Clean
« Reply #77 on: September 15, 2015, 07:42:58 pm »
Never heard of nitrogen injection...not sure on why that would specifically work...Google?
I had a hard time finding it in Google. Difficult to wade through all the stuff about nitrogen enriched fuel.
Cam Brodie figured it was a treatment like the Partmaster product someone else mentioned... likened it to oven cleaner! I'll see if I can get some more info on the service from the dealer...
James
Current: 07 Audi RS4, 07 Audi S6, 94 BMW M3, 92 BMW 318is (race car), 04 Honda Odyssey
Past: 91 Ford Laser GT-X, 98 Mitsubishi Legnum VR-4, 04 Subaru Legacy GT WR Edition, 93 Nissan Skyline GT-R

Offline waxer

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Re: B7 Carbon Clean
« Reply #78 on: May 12, 2016, 08:21:29 pm »
I have just had this done by a local guy. Great guy BTW. Not intended to remove the caked on crap but clean through the sludge or something. Plugged 2 machines in a blasted it through. I've not had the chance to fully test it. Will report back. $300+

Offline bballz

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Re: B7 Carbon Clean
« Reply #79 on: May 14, 2016, 11:07:31 am »
dunno about nitrogen, but i finally found someone in NZ that uses a wallnut shell blaster similar to what people talk about on the other US/EU audi forums - and all i can say is HOLY crap it was way better

i guess its subject to who/how well the CC was done before