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Never Carbon Clean Your Car’s Engine


rev up your engines, today I’m going to
explain the truth about carbon cleaning your engine, now as I showed in previous
videos, it really doesn’t matter if the outside of your engine is dirty, but it’s
important that the inside of your engine is clean, so of course you want to change
your oil regularly to keep the engine clean that way, but realize that when
gasoline burns in Earth’s atmosphere inside your engine, that one of the
byproducts is carbon, and carbon can take up space inside your engine, if you get a
lot of carbon buildup inside the combustion chamber, the carbon takes up
space, that space will make the compression ratio go higher, because you
have less space in the same area it’ll make the compression higher compression,
it can lead to pre-ignition your engine clanging when you’re driving around, it’s
not a good thing, now in conventional gasoline engine like this Toyota Matrix,
the fuel injectors are on the intake so when the air gets sucked into the engine,
the fuel injectors spray gasoline with that and they go over the intake valves
as they’re sucked in, and if you know anything about gasoline it’s very good
solvent, it’s a very good cleaner, so you generally don’t get much carbon buildup
on the valves of a conventional engine if you use good gasoline and change your
oil regularly, but if you have one of these modern GDI gasoline direct
injection systems, an older Volkswagen with one, they’re notorious for carboning
up the engine, because the GDI injectors are
directly spraying fuel into the block, they don’t spray it over the intake
valves, and with all this anti-pollution equipment, the PCV system can take oil
deposits and stuff out of the engine and burns it, but since it’s no longer mixed
with gasoline when it goes over the intake, it can build up carbon on the
intake system, I guess you could say they should have seen it coming when you’re
talking about the Volkswagen engineers, but alas they didn’t see it coming
I’ve seen Volkswagen engines that were so carboned up that you had to take the
intake off and you had to get a sandblasting machine and instead of
putting sand in it, you would put walnut shells because
they’re softer, and you would actually have to bless the carbon off the inside
of the engine, now some of the really modern engines that have GDI, like some
of the Toyotas, they actually have a GDI system and then they also have the
regular fuel system on the intake system and the computer alternates back and
forth, so the regular injectors on the intake spray gasoline over the intake
valves to help clean them, and those engine hey don’t have a problem with
them carboning up, as long as you use good gasoline and change the oil
regularly, I see a lot of people are trying to sell carbon cleaning to their
customers, they went out they bought a machine, they want to pay for the machine
and make a profit, so they try to tell everybody, Oh your engine needs carbon
cleaning, we got a carbon clean your engine, and many times that’s not the
case, they don’t need carbon cleaning, now if
you want to see if your engine needs carbon cleaning, you can use one of these
borescopes and look inside your engine, I like this one cuz it’s a standalone unit
but I’ve even bought 14 dollar ones on eBay that hookup to either your laptop
or your phone and they work perfectly fine
too, so they don’t cause much anymore we’ll just take off the beauty cover,
and take off this ignition coil, out it comes, and remove the spark plug, then we
get the scope and look inside, and as we can see inside here, this thing is pretty
clean there’s no clumps of carbon lying around, which doesn’t surprise me at all
in this matrix engine, hey we don’t drive drive it that much, I change the oil every
3,000 miles and use a high quality synthetic oil and
use good gasoline, and both my wife and I are pretty fast driver so we keep the
engine revved up which helps clean it out yeah engines can carbon up if you don’t go
over 30 miles an hour, that’s where the supposed myth of the Italian tune up
actually does work quite well in cars that are driven too slow, the Italian
tune up being the slang for, getting on a highway driving your car real fast, my wife
used to have a camry station wagon and she drove it three miles a day back
and forth to work in city traffic, one time we took it to San
Antonio which takes about four hours to drive and the speed limit
someof the way was 75-80 miles an hour, and when
we got back boy that thing ran even better, it ran okay before but it idled
better smoother had more acceleration cuz that help clean the carbon out of
the engine from it going too slow all the time, but let’s say you looked inside
you saw a whole bunch of carbon and you need to clean your engine out, maybe you
bought a used car, maybe it goes too slow, there are lots of carbon cleaning
systems out there, but only a few of them are actually safe, now one is using water
what’s water do when it gets really hot it turns to steam, steam cleaning can clean
things really well, now it actually can work but it has one main disadvantage, if
your tempted to do it yourself by spraying it in or just pouring it in the
engine, you get too much water in you can hide or lock the engine and bend the
Pistons and do all kinds of damage, now professional mechanics have water
cleaning machines takes about 40 minutes to do, you pay the mechanic to do it he
has a machine that’s setup for that but it doesn’t do any damage it’s a
relatively complicated procedure it’s not just sitting there guessing
spraying or pouring water in the intake back in World War 2 some
fighter planes they had a system that if they were being attacked and they had to
try to get away as fast as possible, they could actually inject coolant of the
engine right into the engine, because not only does it clean but of course it
gives a boost of power hydrogen h2o oxygen, you get more power that way, it’s
not something you’re going to do all the time sometimes the engines would blow up, but
I guess if someone’s behind you with 50 caliber machine guns blast away, you
really don’t think about damaging the engine that much
the thing that seems to do the best cleaning that
I tried out is ats chemical one, the 3c induction cleaner, it hooks up to the
induction and what it does is there’s a microprocessor and it has time to
release of chemicals that they’ve created to clean all the different parts and do
it correctly without damaging the engine now I remember a
while back when Ford came out with their GDIs and they were having carboning up problems,
Ford put out a note that said, do not use these carbon cleaning
chemicals, because if you do chunks might come off and if you have a turbocharger
it can break the turbocharger, if you have big enough chunks it could clog up the
catalytic converter, they were saying not to use these cleaners, but this system
works differently, it took these guys years to figure this out, out of Albuquerque New
Mexico, I guess there’s nothing else to do in Albuquerque, so you might as well
invent something, modern fuels and additives and oils and their additives, so
having a new system with special chemicals run by a microprocessor it
only makes sense to me, so as far as I’m concerned the ats cleaner seems to do
the best job of any of them out there but as I said before, you have to decide
hey do you really need your engine carbon cleaned in the first place, of
course you can test it like I showed with the borescope, if you got an older
Volkswagen with the older GDI system, I definitely would advise having that done
every once in a while because they have a problem with building up, but if you
have a normal non GDI engine and you drive at normal highway speeds a lot, you
probably don’t need any cleaning, but if you drive like a turtle or let’s say you
just bought a used car from an estate from an old person that hardly drove at
all, and maybe it has 15,000 miles and it’s 18 years old, probably be a good
idea to have some carbon cleaning done to that, but don’t be misled by the promises
of your cars going to run better, it’s going to have more performance, it’s
going to get better gas mileage, if your car runs perfectly fine now, you really don’t
need a carbon cleaned, because modern gasoline configuration they keep
perfecting it, it burns much better than gasoline when I was a kid, when my
grandfather was a young mechanic those Model T Fords would carbon up all
the time, practically every winter you’d have to tear the engine apart, clean the
carbon off the valves and pistons and put it back together again, those days
are long gone, and since the fuel injector systems are run by computers as
as is the ignition modern cars are much more efficient,
you’re not gonna have the build-up of carbon as much because of that reason,
but whatever you do, don’t just get a jug of water and start pouring it down the
throttle in the engine, you can just and engine doing that I’ve seen that
happen, and please don’t go to one of those car washes and use one of their
wands that has the high-pressure steam and do it, totally unregulated and you’ll
probably destroy your engine if you start spraying that inside, so now you know
the truth about carbon cleaning your engine, and realize for most people most
of the time, it’s an unnecessary process the car just does need, because
unfortunately carbon cleaning that’s become like some of the snake oil
products where people say, add this to your engine oil then it’ll run better
and rebuild your engine while you drive it’s all a bunch of nonsense too, the
additives in oil are fine, the additives in modern gasoline are also fine, for
normal driving you don’t have to mess around with carbon cleaning, but if you
are a worrywart hey pull out a spark plug or two, look inside with a borescope,
if it’s clean inside ha peace of mind knowing yeah you don’t have to do
anything, so if you never want to miss another one of my new car repair videos,
remember to ring that Bell

Bernard Jenkins

100 Comments

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  2. Im from europe and i have a golf 7 gti clubsport. That engine has dual injection like you said, dont have this carbon buildup anymore

  3. I have a 2014 Kia with GDi (bought used over 115k miles) Is this something I sould ask my dealership to look into?

  4. Even in 1980 with carburetors, never had a problem because I had my foot in it whenever the engine was warmed up. Even a mechanic noted I did not have much carbon when I had a blown head gasket on a Mazda B2000. Just a little soot you could wipe with a rag. LOL.

  5. Same crap with turbo charged BMWs. Walnut blasted my 11 335 at 80k miles. I maintain the car meticulously so the build up was not bad. The N55 is actually less prone to build up than the 335s with the N54.

  6. This doesn't help me for my 65 mustang lol. My engine needs cleaned out bad.

  7. Yeah but Scotty, a completely carboned up VW engine will completely blow past any Toyota or Honda and leave em in a nice carbon trail, so there is that …

  8. I like how in the little picture in the top right corner at 5:26 it says "oxy-hydrogen gas" instead of just saying steam, which is technically what that is, gaseous H2O. That's just another way a mechanic can charge u more. Saying that he has to use "oxy-hydrogen gas" to clean the carbon makes it sound a lot more expensive than just saying," I'm gonna use steam to clean it lol.

  9. Very informative! I have a '14 SHO with 130,000 miles and still runs pretty darn good. I will however checkout one of those bore scopes and check inside!

  10. At a certain point all the technology and money spent to make a car more efficient costs more than the gas saved.

  11. The thunder bolts had a water methanol injection. Also helped with a 300 horse boost👍

  12. Man, why do you have to tell everyone these things? There goes my commission….
    Everything you said is truth though. The truth sets us free I guess. Keep up the great work bro.

  13. You can buy / rent everything you need to walnut blast the valves at home for 200 bucks or less. Harbor freight sells a cheap blasting kit. Rent an air compressor from home depot. Then all you need is a shopvac and an adapter to fit the intake port. Take off the manifold and go. Takes half a day.

  14. At the stealer ship we sold these for $151.03 recommended every 45k. More than every other flush besides the trans flush and the least nesessary. Glad I don't work there anymore. And brakes flush recommended every 24k…

  15. My Dad told me years ago that all gas stations sell the same gas. Come out of the same barrels!

  16. That's a waste of money. The cheapest gas is fine unless you drive a precision sports car.

  17. hey Scotty I am big fan I would just love for you to talk more about diesel engines and about adding LPG system to Gasoline and diesel engines
    wish a nice day

  18. 1:57 "But alas" – lost it omg wtf I need to know if this is Scotty or the editing, who does the editing Scotty.

    Scotty Kilmer is what the true nature of the internet should be.

  19. I make sure I stomp the pedal on my Jetta tdi with a stage 2 tune and a straight through exhaust, and egr valve. I can see the black leaving the car… quite awesome

  20. Greeting from Eastern Europe. I have a 2003 Audi diesel engine, a 1.9L pumpe-duse. My mechanic had it cleaned for me and I can definitely feel the difference, I have a manual shifter and I listen to the engine and drive it hard so I know the power output and responsiveness and what the engine usually does. I was skeptical about the carbon cleaning but it really made a difference, I have more power and responsiveness and it was definitely worth the $30 that I payed for it. Maybe Scotty is right about gasoline engines, but on an old VW diesel like this that was never cleaned before, it did make a big difference.

  21. Scotty, the water injection system used on various WW2 fighter aircraft allowed the use of a higher than full throttle stop position called Emergency War Setting, which pushed a much higher manifold pressure from the turbo super charger. The water cooled the combustion chamber to prevent detonation. The hydrogen in the water is not a factor.

    This, especially when combined with an agressive propeller pitch setting, put a massive strain on the entire engine. The manual warned that more than five minutes at that setting would damage the engine; a serious situation in a single engine fighter. It was intended to be used in dogfight situations to escape a bogey on your tail. Fighter pilots had a saying "Speed is Life." Designers therefore pushed piston engine power to it's absolute limits before jet turbines became practical. There were also various water / methanol mixes tried to improve absolute power in emergencies. Sincerely, Larry
    PS. Today's GDI engines in cars use a similar liquid to vapor phase change effect from the direct injected fuel to allow a higher than nominal combustion ratio.

  22. Some WW2 aircraft, like the P-47 injected small amount of water to cool engine at emergency full throttle to allow a more advanced timing while eliminating hot pre-ingnition pinging. The more advanced timing allowed for a few more horsepower.

  23. I thought about getting a turbo charged Hyundai Veloster but then I did research on GDI engines and went with the naturally aspirated veloster with the MPI engine 😂

  24. Hey Scotty, what about the direct injected engines, where the stems and backs of the intake valves get carboned up by PCV blowby?

  25. Scotty, you missed half the point in "carbon cleaning" an engine. Ever seen a particel filter and catalytic converter on a car that does many shorter rides (Less than 15-20 miles) and/or no Autobahn trips? I´m tellin´ya, they can be almost totally closed after 100.000 km. Especially if they do not get the proper sevice clean at every oil change. If you get to them in time a carbon clean can clean them up without taking the thing apart. That´s why it is nowadays recommended to have the service done every approx 50.000 km. so you can keep your modern diesel on its toes all the time.

  26. ha ha, yes it does matter if your engine is dirty,  and oily engine = higher probability of a FIRE, but yea, with 30 millon or more GDI cars out there,  I'm wondering why you play down the need to be proactive.

  27. Scotty, What is your take on Seafoam? As, I bought a car that has lots of carbon and would like to clean it out.. Thanks bunches for your educational videos!

  28. They seen it coming. They just saw more money coming in for there parts department.

  29. The moral of the story is, plumb your PCV into the exhaust, not your intake, especially if you have a GDI engine. Make sure to do it DOWNSTREAM of your upstream o2 sensor so you don't clog it prematurely. As always, check local emissions laws before doing something like this. Even though it won't increase you car's emissions (it will actually reduce lifetime emissions due to the engine staying cleaner on the inside), it probably won't pass a visual inspection.

  30. What about a Honda CRX with 200k miles with oil leaks, do you think it might need cleaning??

  31. There is a product that uses a solvent and requires the engine to be running , it has been around for years and works a dream .

  32. Dude……Albuquerque has loads to do.

    You have the Sandia mountains & potatoe & green chilli stew.

    What more could you want?

  33. I saw a man at a car wash when I was waiting to wash my pick up I thought he was leaving but popped his hood got a shop broom with soap out of his trunk scrub his engine and then sprayed it with water it's safe to say he didn't leave the car wash that day I was shocked when I saw him do this and it was in a modern car

  34. Have you tried BG or BlueChem air induction service products? They are usually found on stealerships

  35. Went WOT the other day in the Jeep and a bunch of black crap came out the exhaust. Wondering if this is the natural way to get it out? What FI cleaner will work best? The Italian tune up!

  36. Hey Scotty, I like your videos you talk a lot of sense. If you want a constant stream of water vapour/steam which you can regulate into the air intake use a wallpaper steamer just take the tools off set the amount of steam you want put the tube into the intake after the maf important and run the engine for 20mins just don’t go mad with the steam slow and easy does it.

  37. So you telling us to break the law and go over all speed limits oh I see a school sign when school's out better go over 40 or 50

  38. Statiscally speaking you don't use more than 1% of all that junk piled up in your garage 😁

  39. We have a four cylinder direct injection 2011 Sonata with 155K miles. For the last 12 months it has been using about 1 qt of oil per 1000 miles. I have not noticed any leaking oil on the driveway or any exhaust smoke. Any suggestions on where to start with this car?

  40. O.K., Scotty .. but we should still use throttle body and M.A.F. cleaner, from time to time, right?

  41. As far as Scotty Kilmer merchandise, where can I get an official pair of his Lennon-style sunglasses? &:-D)

  42. It’s hard not to laugh at the irony of US citizens being sold poor quality gasoline…!

    What do I mean? You really need that explaining? Well, half your taxes are used to fund your military which is deployed overseas in illegal wars to steal the wealth of other smaller and weaker countries.

    And every country in the world is forced to trade oil in US Dollars – which is the only reason the US Dollar has ANY value at all. Remove that constraint and the whole system falls over.

    Sure, you get subsidised gas at the pumps, but you’ve already had the rest of your taxes used to pay for subsidies and tax breaks for the oil company that sold you your poor quality subsidised gas!!

    So yeah, beyond fuckin’ ironic if you ask me.

  43. put in a can of sea foam. And rev it up regularly. The right way to inject water is using an ADI system. (anti-detonate-injection). Usually a 60/40 water methanol mix. It's sprayed as a mist at some location in the intake system when the engine is at high power, and drops the temp of the air and makes it denser. Jet engines used to use it also, the old water wagons we called them. But they used pure water. It would probably keep it cleaner inside if used often. ADI systems are mainly for turbo or superchaged engines. I've never heard of it used in normally aspirated engines. It's more effective than an intercooler, since it drops the air temp. much more.

  44. Italian tune up suits my 2.0 Saab aero – tried machine carbon clean utterly useless !
    Run car on Shell advance fuel – good detergent qualities as shown by clean plugs
    Need Scotty in Whitehouse ! Talks a lot of sense with no bull crap 💩

  45. It's like the car wax that last's a year out in the elements or makes it go faster; or it's like paying extra for nitrogen filled tires, although compressed air is 90% nitrogen anyway!

  46. Can I just vent the pcv valve to atmosphere and plug the intake to the induction system

  47. so this guy says dont carbon clean your motor. also take your vehicle to the mechanic to carbon clean your motor. what the hell is wrong with this guy?

  48. Are you the brother of Jonny Dave? Just suspicious cause you act like him hehe..

  49. Italian tuneup = It steam cleans the cylinder with the small amount of water that is in the fuel from condensation – so that's why it works

  50. Should've listened to you Scotty Kilmer. CRC intake valve cleaner clogged my catylatic converters. How do you keep GDI engines Cleaner.

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