Audi's official answer to carbon build up

[wolfgang]

An engine oil change must be performed following the use of cleaning agents!

That bit is interesting. Why would an oil change be required? Is it because the stuff that comes off contaminates the oil?

Would using something like Wynns Formula Gold Petrol Treatment as a fuel additive make any difference.

[adsgreen]

Pretty standard to change the oil after a flush.
The clear out gets taken away by the oil as well as some out the exhaust manifold.
Iirc it makes the oil very black and really smelly.

I hear what people saying but the article reads pretty generic to me. It's also counter to what Audi do iirc with blasting it with nut shells(?) . I don't think the residue on fsi engines is actually carbon (on the conventional sense). Proper coking is brittle and dry where the description of this issue is more a sticky sludge. Don't get mr wrong - there's carbon in there but theres more to it. if it were as simple as adding a small additive to the fuel once a year then it'd be a non issue. (and that's not factoring in if it's a problem to begin with)

[wellzieRS4]

Whos going first then?

[wrekka]

Whos going first then?

what do the specialist think, like MRC etc of this?

[Rick_RS4]

Whos going first then?

what do the specialist think, like MRC etc of this?

most probably dont do it, as it will be cheaper than a manifold off clean,

however by the looks of the carbon build up pics it looks very stuck on and doubtful that any additive will remove it,

adding anything to the fuel wont do anything as the injectors inject below the valves not onto them.

5litres of mr muscle down the inlet should do the trick lol

[lengster1]

Its not clear how it works is it? are they saying the detergant is introduced to a running engine for 30 mins via the inlet tract somehow (presumably some sort of spray canister) effectively washing it all into the combustion chamber and back out through exhaust valve??? You want to wash all that carbon into your bores???? ive got it wrong or there having a laugh but cant see how else it would contaminate your oil and require a change after this procedure? If i got the right end of the stick then i wouldnt touch this method with a barge pole unless the did a before and after compression test and boroscope inspection of the bores

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Seems pretty clear to me - the article states it's introduced using a temporary replacement fuel system which is why it also states (bar one) not to put it in the fuel tank.

I've flushed through other engines using similar products and it trashes the oil. It really smells bad when you drain it.

I agree you wouldn't want some of the chucks I've seen just falling off into a running engine. It's why mrc and others work on the cylinders with closed valves. These kinds of products are designed for relatively small amounts of coke.

[adsgreen]

Interesting article from wynns themselves on direct injection.
http://www.wynns.net/product_files/dire ... 023079.pdf

[ArthurPE]

I'd like to see the manual...how the system hooked up...if it's to the fuel rail, won't help the inlet valves...as someone said...will do the cylinder, piston, etc.

I am working on something to do this, there will be millions of cars, and mucho $$$ to be made...
I personally don't think deposits are an issue, but if people are willing to pay for 'scotchguard', permanent paint sealant and tranny flushes, why not make a few bucks?

it is non-corrosive, biodegradable, non-chemical/toxic and abundant
hook the system up, and drive around on the highway for an hour (or so)
should make it spotless....it will dissolve it slowly and in very small pieces, no chunks...may need 2 treatments for extreme cases
should not require an oil change afterwards

[Ice_Coffee]

Interesting article from wynns themselves on direct injection.
http://www.wynns.net/product_files/dire ... 023079.pdf

Very interesting indeed

[lengster1]

The only way it will work is to introduce via the inlet track,introducing it via std injectors into the combustion chamber AFTER the carbon build up isnt going to do anything hence i presumed via a pressurized vessel it would be introduced to the intake system BEFORE the carbon build up to have any effect

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The only way it will work is to introduce via the inlet track,introducing it via std injectors into the combustion chamber AFTER the carbon build up isnt going to do anything hence i presumed via a pressurized vessel it would be introduced to the intake system BEFORE the carbon build up to have any effect

I'm presuming that it's been written without FSI in mind. Knowing how these documents turn up, it's probably a modification to an older document thats been sitting on someones desk for a while. Not saying it's not accurate or the tests were not valid just that it's a normal petrol engine process. None of the products specifically mentioned are designed for aerosol use and all are fuel additives.

[SR71]

it is non-corrosive, biodegradable, non-chemical/toxic and abundant
hook the system up, and drive around on the highway for an hour (or so)
should make it spotless....it will dissolve it slowly and in very small pieces, no chunks...may need 2 treatments for extreme cases
should not require an oil change afterwards

Art,

Are you saying the above is what your invention will do/how it will work?

Somehow, for FSI cars, it needs to be introduced pre-valves doesn't it for maximum utility? Or are you operating on the principle that if the deposition can occur as is, any cleaning agent should be able to clean via the same mechanism which allows the deposition in the first place?

[Timster]

I'd like to see the manual...how the system hooked up...if it's to the fuel rail, won't help the inlet valves...as someone said...will do the cylinder, piston, etc.

I am working on something to do this, there will be millions of cars, and mucho $$$ to be made...
I personally don't think deposits are an issue, but if people are willing to pay for 'scotchguard', permanent paint sealant and tranny flushes, why not make a few bucks?

it is non-corrosive, biodegradable, non-chemical/toxic and abundant
hook the system up, and drive around on the highway for an hour (or so)
should make it spotless....it will dissolve it slowly and in very small pieces, no chunks...may need 2 treatments for extreme cases
should not require an oil change afterwards

Hi Arthur... I thought you were working on something.
When can we get some and test it for you?

[ArthurPE]

yep, introduced into the air filter housing or afm duct

Art,

Are you saying the above is what your invention will do/how it will work?

Somehow, for FSI cars, it needs to be introduced pre-valves doesn't it for maximum utility? Or are you operating on the principle that if the deposition can occur as is, any cleaning agent should be able to clean via the same mechanism which allows the deposition in the first place?