[bikertillidie]

Originally Posted by scorpian

I would say the EGR is the reason for the extreme carbon soot buildup. One of the reason i did a remap was to close the EGR and also post that i removed the intake manifold and it was clogged by over 70percent at 88k kms.

My advise would be to get a soft remap done and close the egr and get the intake manifold and head cleaned once so that you will not face this issue again.

Thanks Scorpian. This could possibly be the foremost contributor to carbon deposition.

Has anyone used a blanking plate to isolate the EGR assembly completely?
That would be a much easier option as the assembly is held in place by only two M6 bolts.

The intake manifold on Ford Tdci diesels can be easily accessed by removing the valve train cover. I am seriously contemplating use of carb/choke sprays/scraping off deposits using a screwdriver to clean off the buildup..

Attaching a picture of cylinder head for reference. The four largish round openings at the top lead to the intake valves

[Aroy]

Originally Posted by bikertillidie

Just came across this thread. Makes for a very interesting read.

Modern direct injection engines are bound to end up with a fair amount of soot/carbon deposits on intake valves due to their very design.

What's the best best way to decarbonise such engines?

Introduction of cleaning agents/fuel additives does not really help here as fuel is sprayed directly into the combustion chamber..

Any thoughts?

In most modern engine carbon deposits are found in the intake side. Exhaust side deposits are burnt once the engine reaches optimum temperature and is run for at least 30km+. The so called Italian-Tuneup is just running the vehicle at moderate to high speed (on open highways) for at least 100km, ideally 200. That will get rid of msot of the carbon deposits in the exhaust side.

For intake side, there is no magic solution. Just get the intake manifold cleaned every now and then.

[Krish_Diesel]

Can anyone suggest good Carbon cleaners who does the decarbonization in Bangalore? I am looking for such who does not use any additives or chemicals.

[cpbhp]

Originally Posted by Krish_Diesel

Can anyone suggest good Carbon cleaners who does the decarbonization in Bangalore? I am looking for such who does not use any additives or chemicals.

Any chance you found a workshop that does this in Bangalore?

[Krish_Diesel]

Originally Posted by cpbhp

Any chance you found a workshop that does this in Bangalore?

I have recently got it done at The Royal Carbon Cleaners in NRI layout 5th main road near TC palya main road. They used HHO technology and didnt use any chemicals. Car is performing really good. I would surely recommend this.

[Aroy]

Originally Posted by cpbhp

Any chance you found a workshop that does this in Bangalore?

You can get rid of most of the carbon deposits by running the engine hot for a few hours. It is called Italian Tune-up - go for a 100-200km ride on a relatively traffic free highway. Maintain a speed of 90km/h+. two or three hours at this speed will burn up most of the carbon deposits.

Even in a gas guzzler 200km will need 20L or so of fuel. Way cheaper than a visit to a mechanic. Of course the thrill of the journey can never be matched.

[Bsilver]

Originally Posted by Krish_Diesel

I have recently got it done at The Royal Carbon Cleaners in NRI layout 5th main road near TC palya main road. They used HHO technology and didnt use any chemicals. Car is performing really good. I would surely recommend this.

Got this done on my 17 year old Fabia 1.4 TDI, it usually works only for the first few hundred kms, and my car is driven mostly in city, so it increases the chances of the build up, I even went for a long drive almost 250kms non stop, which does not clear up the carbon anymore( it did when it was at 1L kms, but now it is at 1.35L). Would be removing the intake and exhaust side, and clearing it up manually in the coming days. HHO works best if done at least every 6 months, but the cost being around 2000, it would be easier to get it cleaned by removing it, rather than the HHO, and still having an blocked engine. Will be posting a detailed teardown and clean here as well in a few days.

Happy Motoring!

[Krish_Diesel]

Originally Posted by Bsilver

Got this done on my 17 year old Fabia 1.4 TDI, it usually works only for the first few hundred kms, and my car is driven mostly in city, so it increases the chances of the build up, I even went for a long drive almost 250kms non stop, which does not clear up the carbon anymore( it did when it was at 1L kms, but now it is at 1.35L). Would be removing the intake and exhaust side, and clearing it up manually in the coming days. HHO works best if done at least every 6 months, but the cost being around 2000, it would be easier to get it cleaned by removing it, rather than the HHO, and still having an blocked engine. Will be posting a detailed teardown and clean here as well in a few days.

Happy Motoring!

Did you do it at the same The Royal Carbon Cleaners? I have done it for my Ford Ecosport and they mentioned that it would be there for a minimum 10,000 kms and it worked well till 10,000 kms. After that the carbon will start forming and gradually we can see the performance decrease. I was able to find the mileage improvement as well, where I could drive to Wayanad up and down from Bangalore (KR Puram) with diesel worth 1,800/-. It's been almost 20,000 kms and I am planning to go again. The charges were 1,300/- for Ecosport.

[Bsilver]

Originally Posted by Krish_Diesel

Did you do it at the same The Royal Carbon cleaners? I

No, I got mine done at Basvangudi, but it's the same black machine which they use almost everywhere. Good to know yours lasted a 10000kms, but I forgot to mention that EGR is kind of partially open ( need to check through VCDS ), and my cat is almost fully choked. So if at all your car has a free flowing cat, then mostly HHO works. I noticed marginal increase in performance which was gone after like 700 800 kms.
He charged me 2k for 1:30 hrs session. Will be posting about egr after seeing it's actuation cycles, and hopefully the internals as well, if I get the spare time to dismantle it

Happy Motoring!