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Thread: Engine decarbonising (saw it on wheeler dealers)

  1. #21
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    I think on my engine the carbon is holding it together. It's not old, just been a motorway car.

  2. #22
    Mucking Fuddy Mark's Avatar
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    Quote Originally Posted by Jonny View Post
    Their fuel pressure gauge only seems to go up to 4 bar

    Stripping down a 100K MX5 engine, it was pretty clean inside - with modern fuels and oils and such engines don't get coked up like they used to... Not sure about diesels, but I think diesel's a lot cleaner than it used to be...
    Yer I would say combustion chambers stay fairly clean, they will be a bit sooty on diesels but the main problem diesels get are EGR valves and inlet manifolds and this system wont go anywhere near those. All i would do is take the inlet and EGR off, give it a good clean with petrol or similar and then put it all back together. They buy a bottle of injector cleaner, stick it in the tank and drive the thing

    TDCI injection systems are made to very tight tolerances and are very expensive to replace. The fuel rail operates at 1500bar so i cant see how this system will even get the injectors to fire let alone clean anything.

    i certainly would want to be the guinea pig

    Its been invented in the US where they still champion the OHV engine and use simplier injection systems. I am sure on an old CVH Escort it might do wonders but i wouldnt want to plug by TDCi into it where the injectors cost 300 each and a fuel pump is 4 figures


  3. #23
    Mucking Fuddy Mark's Avatar
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    Quote Originally Posted by Ron Jeremy View Post
    I think on my engine the carbon is holding it together. It's not old, just been a motorway car.


    Then it will be in good nick still spends a lot of time at running temp, doesnt get put under load often. It will be a lot cleaner than a low mileage engine thats just used to go to the shops


  4. #24
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    Next thing you know they will having you pay for Nitrogen to fill the tyres.

    Freely [1] available air is 75% Nitrogen.

    [1] Cost of tyre pump and a bit of effort.

  5. #25
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    Quote Originally Posted by Mark View Post
    ... The fuel rail operates at 1500bar ...
    Really ? 1500 bar ? That's over 20,000 psi
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  6. #26
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    Quote Originally Posted by Jonny Wilkinson View Post
    Really ? 1500 bar ? That's over 20,000 psi
    Yep - bonkers isn't it... Hence my comment about their fuel pressure gauge on the machine only going up to 4 bar

    I've heard reports of failed injectors cutting holes in the side of the block (like you use water jets for cutting in engineering)

  7. #27
    Mucking Fuddy Mark's Avatar
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    Yer you dont want to be standing in front of one if you havent done the pipes up properly


  8. #28
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    Yup, I've seen photos of failed injectors making perfect holes straight through pistions etc, they're so perfectly machined by the injector it's almost a shame that it's caused by accident...if that makes any sense.

  9. #29
    I Love mike Brewer )o( Monkey's Avatar
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    Take a video of your engine being "cleaned", at least yuo'll get 250 from you've been framed LOL

  10. #30
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    While id like it to work the mechanics of it are slightly worrying.

    If used as a maintanance thing then yes it may provide better long term but much like the cans of engine flush you get - I wouldnt want to be using it as a one off esp if the first use is at 200,000 !
    Now with added B + E

  11. #31
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    While id like it to work the mechanics of it are slightly worrying.

    If used as a maintanance thing then yes it may provide better long term but much like the cans of engine flush you get - I wouldnt want to be using it as a one off esp if the first use is at 200,000 !
    Now with added B + E

  12. #32
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    Well, I am interested in getting the BM system cleaned. If it can improve emissions and economy, its all good.

    I just spoke to Gary at APT as I remember him having something similar. He said its about 40-50.

    Mark, the machine used its own fuel supply at 33 psi and the fuel return blocked off. You need the car running, so the injectors work

    Ill be doing a bit of digging myself.
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  13. #33
    I Love mike Brewer )o( Monkey's Avatar
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    a couple serious questions:

    what does this "specially modified fuel" do to the catalytic converter?

    what does the fuel do to the sensors ie Knock, O2 etc will they be reading their nuts off?

    he said on the vid that its good for sports cars due to the fuel being 92/93 RON. but UK fuel is 95 RON and higher, how will this effect that?

  14. #34
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    Quote Originally Posted by Matt_S View Post
    Well, I am interested in getting the BM system cleaned. If it can improve emissions and economy, its all good.

    I just spoke to Gary at APT as I remember him having something similar. He said its about 40-50.

    Mark, the machine used its own fuel supply at 33 psi and the fuel return blocked off. You need the car running, so the injectors work

    Ill be doing a bit of digging myself.

    Yeh but what mark means is the pressure wont be high enough for a common rail derv to start... Most will start lower than 1500bar... The lowest i've seen one fire is 900 bar... If the rail pressure doesnt see at least that it wont fire the injectors. The only way it could be high enough pressure is if it is fed at into the high pressure pump

  15. #35
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    Why is everyone thinking that theyre connecting up straight to the injectors? They will most likely connect up after the lift pump. Though I dont see how that is any different than to just chucking it in the tank.

  16. #36
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    Quote Originally Posted by Monkey View Post
    a couple serious questions:

    what does this "specially modified fuel" do to the catalytic converter?

    what does the fuel do to the sensors ie Knock, O2 etc will they be reading their nuts off?

    he said on the vid that its good for sports cars due to the fuel being 92/93 RON. but UK fuel is 95 RON and higher, how will this effect that?
    Its just the US figures, 92/93 is equivalent to 97/98 in the UK

  17. #37
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    Quote Originally Posted by jones s13 View Post
    Yeh but what mark means is the pressure wont be high enough for a common rail derv to start... Most will start lower than 1500bar... The lowest i've seen one fire is 900 bar... If the rail pressure doesnt see at least that it wont fire the injectors. The only way it could be high enough pressure is if it is fed at into the high pressure pump
    Dunno where you got that figure from as they start to fire at around 200 bar or slightly less. The only time they will ever run at full pressure, 1200-2500 bar depending on fitment is when your at full load and even then the pressure will drop off and you will struggle to reach near full pressure in first gear. There seems to be a lot of myths about common rail diesels and I've read a few of them in this thread.

  18. #38
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    Quote Originally Posted by thebigroyboyski View Post
    Dunno where you got that figure from as they start to fire at around 200 bar or slightly less. The only time they will ever run at full pressure, 1200-2500 bar depending on fitment is when your at full load and even then the pressure will drop off and you will struggle to reach near full pressure in first gear. There seems to be a lot of myths about common rail diesels and I've read a few of them in this thread.
    Well the bm's at work wont start with that pressure...live datas rail pressure was at around 200 bar and it wouldnt fire...new high pressure pump and it was away. Although that was a very new one.. And was more to do with the lazy delivery instead of spiking upto pressure. Your right i was out on my figures..apologies.. On the newest dervs we have you can see an intial spike of 300ish (aparently some newer systems can produce upto 500bar crank! not sure how true that is and i've never witnessed it, possible twin piston highpressure pump??) settling to 250 on idle... But getting 1200/1500 isnt difficult under load..even more on the very newest fuel systems. Either way im intersted to see how this stuff is fed into the system.

    the only decoke ive ever heard of working is what mitsubishi use which is a machine that replaces the inlet manifold and blasts crushed nutshells at the inlets to break down carbon that builds up on the inlet valves
    Last edited by jones s13; 12-05-2012 at 15:33.

  19. #39
    Member Matt_S's Avatar
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    Well, I called my local Terraclean agent just now. As mine's a 3L it will require half as much again for the treatment so it comes it at something like 120! :O

    I had a chat to the guy and he is amazed by it. He reckons theyve done about 100+ since February and every single customer has been impressed.

    Gave examples of a VW PAssat failing the MOT on smoke test 5 times. Ran the TC through it and it passed with no worries. THe local MOT guy can tell when a car has been ran now as the results are so different.

    He said it cleans the carbon from everywhere in the fuel system and combustion chamber. Cleans the affected sensors too. Basically anything affected by the fuel or exhaust. I asked would it do any damage to cats etc and he said no. In fact he said that if anything was damaged as a result of TC they would sort it FOC.

    I shall be booking it up soon. Ive recently ran a bottle of STP Inj cleaner through and seen a 2mpg gain in economy and V power is doing at least another 2mpg. WHen I told this to the guy, he remarked that it must be pretty carboned up if I can get those gains just from 'passive' additives.
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  20. #40
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    Still don't believe it tbh, I had the head off my CA a little while ago - thats a 15 year old turbo engine that's not been too well looked after.

    The combustion chamber was obviously black in colour but there was no carbon build up inside, the manifolds were the same - a slight smear of oil from my turbo seals leaking but thats it.

    Infact here's a pic of the head just back on, you can see right into the intake ports and all of that muck they will remove for 120

    Last edited by R3k1355; 29-05-2012 at 18:02.

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