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Author Topic: Cleaning carbon build up  (Read 34278 times)

Offline Degudodger

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Re: Cleaning carbon build up
« Reply #45 on: August 24, 2014, 10:30:23 pm »
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Offline Chopper2017

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Re: Cleaning carbon build up
« Reply #46 on: August 24, 2014, 10:35:45 pm »
Right I will offer a free service with this equipment to 1 person on here as long as they report their results on here.
The offer is not open to anyone calling it snake oil.
And I'm not travelling miles out my way either lol.

Offline GrayMK5GTI

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Re: Cleaning carbon build up
« Reply #47 on: August 24, 2014, 10:41:43 pm »
Can you do it at R-Tech in Hinckley (Leicestershire)?

A before & after Dyno & logging session would be the best proof of the results  :happy2:
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Re: Cleaning carbon build up
« Reply #48 on: August 24, 2014, 11:01:41 pm »
I'm in Stevenage, Hertfordshire so thats a way out for me.
When I've got a bit more time on my hands I'll try and get up there, or, I'm going to be contacting Leicestershire council soon, so maybe I can tie it in.
I'm really busy round the Hertfordshire area at the moment you see.
I use Boston 5 gas diagnostics for the before and after results unless you have your own?

Offline bower

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Re: Cleaning carbon build up
« Reply #49 on: August 25, 2014, 08:36:35 am »
i tried wynns egr cleaner to try to clear my misfire/hesitation last month,  yesterday i removed my manifold and as u can see from the pic it didnt do a thing

Offline scopes

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Re: Cleaning carbon build up
« Reply #50 on: August 25, 2014, 09:03:58 am »
i tried wynns egr cleaner to try to clear my misfire/hesitation last month,  yesterday i removed my manifold and as u can see from the pic it didnt do a thing

Would like to see the before and after terraclean intake cleaning !
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Offline bower

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Re: Cleaning carbon build up
« Reply #51 on: August 25, 2014, 09:31:54 am »
yeah me too,  if there is anything that works id like to know cos i dont want to have to take the manifold off ever again!!!!

Offline flashp

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Re: Cleaning carbon build up
« Reply #52 on: August 25, 2014, 10:30:26 am »
I noticed this sentence: It works by giving the fuel a more complete burn in the combustion chamber and else where the hydrogen molecules are positive and negatively charged and so draw the carbon to it like a magnet, much like cars are painted nowadays.
We are expressly concerned with carbon build up above the valve seats, ie not in the combustion chamber. Those deposits in the combustion chamber will be burnt off in the normal combustion cycle.
I'm going to remain completely open minded till somebody show's me borescope images of before and after.

My own thoughts on contributing factors and approaches in dealing with this are a catch can may help but not resolve completely (jury is out on this one), cheap fuel might not help, not driving the car at least occasionally throughout it's designed operational rev range, cheap engine oil and extended service intervals may contribute.

My servicing agent (an independent) has seen some cars with circa 40k on the clock have almost completely no build up and others which are heavily deposited at about the same mileage. Their investigation was completed by intake manifold removal.

Direct injection engines are predisposed to this but it seems that there are other influences at play here also. VW have now added a secondary injector to the newer TSI engines to address this, the fuel washes the valve clean.

For info the text below is a direct quote from a VW technical bulletin:
 
"Gasoline engines with direct injection of the fuel into the combustion chamber, i.e., not into the intake port, suffer especially from the problem of the formation of carbon deposits on components. Carbon deposits form especially in the neck region of intake valves. A more exact analysis of how these carbon deposits form leads to the following result: Oil and fuel constituents first form a sticky coating on the components. These constituents are chiefly long-chain and branched-chain hydrocarbons, i.e., the low-volatility components of oil and fuel. Aromatic compounds adhere especially well. This sticky base coating serves as a base for the deposition of soot particles. This results in a porous surface, in which oil and fuel particles in turn become embedded. This process is a circular process, by which the coating thickness of the carbon deposits continuously increases. Especially in the area of the intake valves, the deposits originate from blowby gases and from internal and external exhaust gas recirculation, and in this process, the blowby gasses and the recirculated exhaust gas come into direct contact with the intake valve.

Especially in the area of the neck of the intake valves, excessive carbon deposits have extremely negative effects for the following reasons: In the case of Otto direct injectors, the successful ignition of the stratified charge depends to a great extent on the correct development of the internal cylinder flow, which ensures reliable transport of the injected fuel to the spark plug to guarantee reliable ignition at the spark plug. However, a coating of carbon deposits in the neck region of the intake valve may interfere so strongly with the tumble flow that ignition failures may occur there as a result. Under certain circumstances, however, ignition failures can lead to irreversible damage of a catalytic converter installed in the exhaust gas tract for purifying the exhaust gas. Furthermore, the coating of carbon deposits in the neck region of the intake valve causes flow resistance, which can lead to significant performance losses due to insufficient cylinder filling, especially in the upper load and speed range of the internal combustion engine. In addition, the carbon deposits in the neck region of the intake valve may prevent correct valve closing, which leads to compression losses and thus sporadic ignition failures. This in turn could irreversibly damage the catalytic converter. There is the potential for small particles to break away from the coating of carbon deposits in the neck region of the intake valve and get into the catalytic converter. These hot particles may then cause secondary reaction and corresponding local damage of the catalytic converter. For example, a hole may be burned in the structure of the catalytic converter.

Globular deposits are found especially on the valve stem downstream from a partition plate in the intake port. Due to the dripping of high-boiling hydrocarbons from the partition plate towards the valve neck or valve stem, globular carbon deposits eventually form there by the sequence of events explained above. These deposits on the valve stem can result in flow deficits due to undesired swirling and turbulent flow around the globular carbon deposits. This may persistently interfere with the formation of stable tumble flow from cycle to cycle.

A possible solution would be to keep these sources of deposits away, for example, from the intake valve, by completely eliminating exhaust gas recirculation and the introduction of blowby gases into the intake port. However with the combustion behavior of modern reciprocating internal combustion engines, at least external exhaust gas recirculation and the introduction of blowby gases into the intake port are absolutely necessary for reasons of emission control and fuel consumption, so that this approach is not possible

 
« Last Edit: August 25, 2014, 10:46:51 am by flashp »

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Offline toosmiles

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Re: Cleaning carbon build up
« Reply #53 on: August 25, 2014, 11:20:56 am »
im gonna get alex@aks to stick a camera scope down my inlet to see what mines like after 39,000 miles,would like it clean before i install water meth
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Offline Chopper2017

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Re: Cleaning carbon build up
« Reply #54 on: August 25, 2014, 02:16:05 pm »
i tried wynns egr cleaner to try to clear my misfire/hesitation last month,  yesterday i removed my manifold and as u can see from the pic it didnt do a thing
[/q

Bower where abouts are you?
Would you be interested in a free carbon clean service providing you report your results on here?
Im going to do Graymk5gti"s when I can get to Leicestershire but I can squeeze 1 more in if your interested.uote]

Offline vRSAlex

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Re: Cleaning carbon build up
« Reply #55 on: August 25, 2014, 02:33:28 pm »
The product is based on hydrogen technology, it is a stand alone unit that produces pure hydrogen which is simply fed into the air intake of any combustion engine.
The results after 30 mins are reduced emissions, increased performance, increased power and increased fuel efficiency due to the carbon being removed and the engine now being able to breath as it should.
If DPF is too far gone this will need replacing but this service will certainly help clean it and prevent build up.
Everything else just gets cleaned.
It works by giving the fuel a more complete burn in the combustion chamber and else where the hydrogen molecules are positive and negatively charged and so draw the carbon to it like a magnet, much like cars are painted nowadays.
I have many graphs showing the before and after emissions readings of many different vehicles that all show the same thing, a measurable reduction in emissions we also have many customer testimonials all confirming the results as well as the official MOD report etc.
What more do you need lol.


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Offline Chopper2017

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Re: Cleaning carbon build up
« Reply #56 on: August 25, 2014, 02:41:04 pm »
The product is based on hydrogen technology, it is a stand alone unit that produces pure hydrogen which is simply fed into the air intake of any combustion engine.
The results after 30 mins are reduced emissions, increased performance, increased power and increased fuel efficiency due to the carbon being removed and the engine now being able to breath as it should.
If DPF is too far gone this will need replacing but this service will certainly help clean it and prevent build up.
Everything else just gets cleaned.
It works by giving the fuel a more complete burn in the combustion chamber and else where the hydrogen molecules are positive and negatively charged and so draw the carbon to it like a magnet, much like cars are painted nowadays.
I have many graphs showing the before and after emissions readings of many different vehicles that all show the same thing, a measurable reduction in emissions we also have many customer testimonials all confirming the results as well as the official MOD report etc.
What more do you need lol.


Traders account and payment for the year  :P

lol fair play... whats the costing?

Offline Duke

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Re: Cleaning carbon build up
« Reply #57 on: August 25, 2014, 04:06:35 pm »
i tried wynns egr cleaner to try to clear my misfire/hesitation last month,  yesterday i removed my manifold and as u can see from the pic it didnt do a thing
Where is the before pic?

Offline bower

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Re: Cleaning carbon build up
« Reply #58 on: August 25, 2014, 04:14:00 pm »
could it be any worse??????
anyway heres a pic after manual cleaning

Offline OSB

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Re: Cleaning carbon build up
« Reply #59 on: August 25, 2014, 04:57:39 pm »
Right I will offer a free service with this equipment to 1 person on here as long as they report their results on here.
The offer is not open to anyone calling it snake oil.
And I'm not travelling miles out my way either lol.


I'll take you up on that offer. I'll even travel. I'll post a fair, unbiased report on here.
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PM me as soon as you have enough posts, and we can sort the details.  :happy2: