GDI Engines and Carbon Deposits | Know Your Parts

we’ve created this program to help you
better serve your customers with gasoline direct injection engines GDI
engines have a problem that can seriously hurt your customers vehicle
performance and fuel economy but the solution is fast and easy for you and
it’s affordable for them to go through the program use the navigation buttons
at the bottom right and watch for a couple of quick quizzes along the way
let’s get started in the past decade gasoline direct
injection engines have become extremely popular with both domestic and import
auto manufacturers compared to conventional fuel injection Gidi I can
deliver improved fuel efficiency more power from smaller engines and reduced
emissions at low load that’s great but the popularity of GDI engines has
brought back an old service issue carbon deposits that can rob drivers of
horsepower gas mileage and smooth operation so why do carbon deposits
happen in GDI engines and how can you help your customers let’s have a look
conventional multi-point fuel injection injects fuel into the intake tract or
cylinder port at low pressure with gasoline direct injection or GDI a
common rail fuel line injects highly pressurized gas directly into the
combustion chamber of each cylinder the improvements in power and fuel economy
come from the extremely precise control that GDI engines have over the amount of
fuel delivered and injection timing fuel and timing are adjusted multiple times
per second according to engine load plus some GDI engines operate on full air
intake with no air throttle plate which further improves efficiency and reduces
piston pumping losses instead of having a throttle plate that restricts the
incoming air supply the engine speed is controlled by the ECU and the EMS which
regulate fuel injection function and ignition timing but as with many
technology advancements there’s also a downside when conventional multi-point
fuel injection injects fuel into the intake tract or cylinder poured gasoline
washes over the back sides of the valves modern gasoline with its package of
detergents is an excellent cleaner so in conventional engines gasoline keeps the
back sides of the valves clean and free from deposits but since GDI engines
inject gas directly into the cylinder gas never reaches the back of the valves
when fuel is no longer washing the intake valves on the way to the cylinder
small amounts of dirt from intake air and blowback carbon from the crankcase
inhalation system build up and burn onto the intake walls the result is carbon
deposits forming on the valves cylinder heads and injectors and that’s where the
trouble begins over time the carbon buildup on the intake valves reduces the
air flow to the cylinders and that reduces torque and horsepower and Hertz
fuel economy the carbon deposits on the cylinder in cylinder head can cause
pre-ignition rough starting and rough idling as well as foul spark plugs and
misfire codes the build-up can become so severe that
pieces of carbon can actually break off and burn a hole in the catalytic
converter many modern GDI engines face a double
challenge because they’re variable valve timing keeps the valves open longer to
maximize the scavenging effects and minimize emissions that leaves the
valves exposed to carbon particles in the cylinder longer and that means more
carbon buildup how big of a deal is the GDI carbon deposit problem it’s big and
it’s becoming huge gasoline direct injection was actually first invented in
1902 by the French inventor Leon lava sir who also produced the world’s first
v8 engine but as of 2008 only 2.3 percent of passenger vehicles used GDI
engines by 2015 the number was up to 45% by 2021 roughly 80 million vehicles in
the US will have GDI engines and more cars with GDI engines means more service
issues related to carbon deposits and that means more customers who need a
solution until recently removing carbon buildup on GDI intake valves had been
difficult in costly labor-intensive processes such as walnut-shell blasting
and manual valve cleaning required an engine teardown to access the valves it
was hard work and a very hard sell to many drivers before GDI engines became
popular fuel additives were used to treat carbon buildup but with GDI
neither the additives nor the fuel would reach the back of the valves but CRC has
an affordable solution that your customers can easily get onboard with
scientists have found that the chemical polyether amine or peña when applied in
strong concentration and under the right conditions can effectively clean
hardened carbon deposits from GDI valves and other engine services without
blasting brushing or any teardown required CRC has used this discovery to
create a GDI carbon deposits solution that allows you to tackle the problem
quickly easily and at a very reasonable cost
CRC GDI IVD intake valve and turbo cleaner is an aerosol spray that’s
applied through the engines air intake or throttle body and delivered directly
to the backs of the GDI intake valves CRC GDI valve and turbo cleaner contains
the highest concentration of peña available on the market to provide the
fastest most thorough chemical cleaning available a single application removes
up to 46 percent of carbon deposits in the first 60 minutes with the ability to
clean heavily baked-on carbon deposits the way it does you might ask is it safe
yes CRC GDI valve and turbo cleaner is safe and effective for all gas-powered
engines including turbocharged and supercharged engines it’s safe to use
every 10,000 miles or at every oil change and it’s safe to use 402 sensors
and catalytic converters but it should not be sprayed directly on a mass
airflow sensor and should not be used in diesel engines high temperatures can
cause carbon to stick to turbocharger turbines housings and waste gates the
turbine blades and oil seals are fragile and carbon buildup can eventually cause
significant damage but the same cleaning action that removes carbon deposits from
valves and pistons cleans turbo impellers as well on turbo engines CRC
GDI valve and turbo cleaner can be sprayed directly through the throttle
body or through the air intake but again never directly on a mass airflow sensor
okay here’s some real-world independent lab results that prove the effective
cleaning power of CRC GDI valve and turbo cleaner
here’s a 2011 Hyundai Sonata cylinder-head before treatment before
treatment the carbon deposits average nine point eight nine mils in thickness
you know that’s going to contribute to a tendency for pre ignition now here’s
that same cylinder head after an hour of treatment with CRC GDI valve and turbo
cleaner the carbon deposits are nearly gone the average thickness is down to
one point five mils the deposits were reduced by eighty-five percent after the
first hour now have a look at the intake valve from the same Sonata after the
first hour of treatment the deposits are reduced by 24 percent take a look at
these fuel injectors also from a 2011 Sonata before treatment they’re heavily
caked with carbon and the flow is being impeded around the injector orifice
after the treatment the valves look almost new a hundred percent of flow has
been restored and the spray pattern and fuel droplet size are once again
optimized for increased fuel economy here’s a cylinder top from a 2009
Cadillac CTS carbon deposits average eight point five nine mils in thickness
after the first hour of treatment the deposits measured two point seven seven
mils a 68 percent reduction in deposit thickness you might wonder why these
test results say after the first hour that’s because the carbon cleaning
action will continue for several days after the treatment as the car is driven
additional carbon that’s been loosened by CRC GDI valve and turbo cleaner is
safely removed by the heat and pressure of engine operation take a look at these
dynamometer results for a 2015 VW Passat 1.8 eye for turbo the vehicle measured
an impressive 5.6 peak wheel horsepower gain two days after treatment but it
picked up an additional six point nine peak wheel horsepower gain when measured
eight days after treatment here’s another bonus CRC GDI valve and
turbo cleaner will also work to clean carbon deposits off spark plugs without
the need to remove them from the engine and finally here’s proof that CRC GDI
valve and turbo cleaner does really work for turbos here’s a 2013 Mini Cooper
countryman turbo impeller before treatment and here it is after treatment
the results are dramatic you can see all our test results at CRC
for shops comm the tests are real and so are the results
CRC GDI IVD intake valve and turbo cleaner really does remove tough carbon
deposits from valves piston heads fuel injectors and intake manifolds quickly
safely and without an engine teardown first just as you would with any product
read the entire product label before using so you can understand the
instructions and the safety guidelines next warm up the engine CRC GDI valve
and turbo cleaner requires a period of heat soak to work so you want to start
with an engine that’s fully warmed up locate the throttle body or air intake
and spray the product directly through the throttle body if the throttle body
is not easily accessible spray past the mass airflow sensor but do not spray
into the mass airflow sensor assembly you can also remove the mass airflow
sensor assembly and spray where the sensor is mounted if the vehicle is
turbocharged you can remove the booster sensor and the charge pipe and spray
into the pipe if it’s easier you can also spray into the vacuum port lift the
permis draw dual action spray system and lock it into place with the engine
running at 2,000 rpm spray in short bursts until the can is empty once the
can is empty rev the engine two to three times but don’t exceed 3,500 rpm run it
idle for one minute then turned the engine off reassemble the air intake
system and let the engine heat soak for a full hour the heat soak is critical so
be patient and let the CRC GDI valve and turbo cleaner do its work after the hour
is up restart the engine and drive at highway speeds for at least 10 minutes
and remember as our tests showed the maximum benefit is achieved when the
vehicle is driven regularly over the next several days so let your customer
know they should drive the car regularly over the next week or so if you have a
vehicle with severe carbon buildup CRC GDI valve and turbo cleaner can even be
used in successive treatments just have your customer drive about a thousand
miles before a second treatment in order to get the full benefit of the first
treatment you GDI engines are not the only engines
that get carbon deposits conventional fuel injected and carbureted engines can
suffer from carbon buildup to CR C GDI valve and turbo cleaner is safe for use
in engines with port fuel injection or carburetors
you can apply the product in the same way as you would on a GDI engine right
through the air intake for automotive service providers the GDI carbon deposit
issue means an expanding service opportunity any time a customer comes in
for an oil change or a regularly scheduled service suggests treatment
with CRC GDI IVD intake valve and turbo cleaner it’s fast affordable and has
real benefits for your customers you’ll be helping to preserve their gas mileage
horsepower and vehicle life while adding a nice boost to your sales as well
well that’s it thanks for taking the time to learn about CRC GDI IVD intake
valve and turbo cleaner we hope you’ll make it a part of your regular service
for your customers with GDI vehicles we believe they’ll appreciate that you’ve
given them an affordable way to preserve their vehicle’s performance and protect
their investment

Bernard Jenkins


  1. I have a question. I am using a top tier 91% gas and 100% synthetic oil. When there is noticeable carbon buildup on the tailpipes; Does this means the carbon is building on the intake valves too or is the engine is getting rid of that buildup and exiting it out the tailpipes and out of the system??? Thank you Gary (2017 WRX Limited).

  2. The first drive after letting the engine heat soak for an hour was rough. I experienced severe knock with 2 different vehicles (2016 Mazda MX-5 and 2017 Mazda CX-5). Is that normal? Also, after that first drive, there was no further knock.

  3. Just install a catch can. Looking at the graph the real world driving average RPM will not exceed pass 4K during cruising. Notices there isn't any differences around 3K RPM between a clean or a dirty valves unless you hit 5K RPM or higher.

  4. This stuff works, I have verified it myself using a Boroscope camera.

  5. and are the procedures the same? but how can i keep the engine running in a hybrid?

  6. I have an Audi A6 3.0T I would be spraying the supercharger if I do it like the instructions….. what should I do? An how often?

  7. this whole video is a scam. All you need is a oil catch can built into the block that will use gravity to make oil get back into the crankcase. That way you won't have to refill oil constantly, that way oil has a higher lifespan, and that way there is no carbon build up. Carbon build up results from the oil being combusted. This whole thing is a scam.

  8. i have the hyundai sonata 2.0t 2017 but I'm not sure where to spray it… because I couldn't find the MAF anywhere…
    is it safe to spray it through MAP?
    can anyone can help me please?

  9. GDI Cars should come with catch cans from the factory. Won't solve the problem but may delay needing to prematurely service the valves.

  10. and what is a chunk of carbon breaks off were does this chunk go ? right it might do some severe damage in a running engine

  11. Were any tests done for potential piston rings / cylinder wall wear from all this carbon entering the combustion chamber all at once? I imagine it's like sand particles that will scratch the walls and cause eventual engine damage

  12. Complete bulshit ! Whatever you spray into the intake when it touches that inlet valves will evaporate in a instant ..

  13. thank you for the great video solved a lot for me keep up the good work

  14. I have a chevy volt you can't control the rpm on the generator. How would you apply this to my car?

  15. ok!! I've one question "well afew" why do you say carbon build up from blow-by carbon, its oil the oil build-up on the intake valves & surrounding chambers are oil, dried, baked oil……

    its not carbon, hasn't any true carbon properties.. its simply oil, dried, baked oil.. this oil comes from poor crankcase ventilation systems… when they fail or jam up they allow greater oil amounts to be sucked into the intake, further adding deposits of oil to the inlet…

    if this chemical is so good, why isn't it sold worldwide?!?

    2nd if its so effective why not have a unit that would allow small sprays of this solution whilst the vehicle is in use… kind of like add blue to a diesel vehicle, only this time to a petrol engine vehicle having this solution being sprayed (water injection style of set-up if that makes sense) this would prevent the issue from occurring from the get-go.

    you also mention its strength, is this solution fit to be sprayed on/around rubber seals…

    I'm in the uk/Europe & to say our intake sprays don't really do a thing other then waste money.. especially those that get sprayed into the intake of an engine….. however having it sprayed directly into the intake chambers & allowed to stand & then using a manual method the oil comes off.. other then that the oil just turns into a sludge with little movement without help etc.

  16. You will ALWAYS get carbon build up in Direct Injection (only) engines, period. However, not all build up are equal.

    Thin, dry, sooty, build up — which are usually mild and will not make a tangible impact on airflow is from valve overlap at lower rpms causing some of the exhaust products to back up into the intake before being sucked back down into the cylinders. If that is all you have, I won't bother to clean it. Dry soot, you see, doesn't really stick!

    Thick, cruddy, oily build up is from OIL in the PCV valve and/or leaky turbo seals. Cleaning it is not really a fix. I guarantee it'll return in 30,000~40,000 miles. Not much you can do about a leaky turbo — time to replace it or sell the car. But you can install an oil catch can in the PCV system to cut down on 90% of the oil getting to the intakes. You can also use an oil that doesn't evaporate as much and does not cause as much oil vapor to go through the PCV system. In general, use a good synthetic that DOES NOT have a wide viscosity range. In general, the 0W-40 is going to evaporate more than the the 10W30 or 5W20. If you want to be sure look up the evaporation loss numbers for that specific oil.

  17. I buy it. Anyone successful after trying. I have a 2016 lexus is 300 that I just bought. Would love to try it and start out fresh

  18. 1. Toyota uses dual injection in their D4s that solve problem in its very beginning.
    2. You forgot about EGR system that is one of three legs of carbon built-up: PCV crank ventilation system+EGR+GDI. All these three are making the problem real.

  19. Try the Italian method.
    Before oil change, fill the tank with the cleanest and best gas you can get. Add an additive for that method if you want. Then run on high load and high rpm so the engine heats up really well. This will burn the carbon on the valves and everywhere and there you go

  20. So it’ll work on non turbo GDI engines ? I’m gonna try this on my parents 2011 v6 traverse & my wife’s 2015 sonata sport

  21. Diesel engines work on the same injection principle(with some differences) how come they don't need valve maintenance so often?

  22. We got a more convenient and more easy to operation for Removing Carbon from Cars, you can take a look here:http://aliurl.cn/0hduv4

  23. Animation fails to show valve overlap. That was the turbine wheel shown, not an impeller/compressor wheel.

  24. CRC Valve Cleaner is the solution but don't follow instructions on can. 2017 Sonata new got 32mpg combined. At 25K now gets 26mpg combined. After cleaning, returned to 32mpg and sets you back into the seat @ WOT, so it works. Bring car to operating temp., spray intake (down flow from any MAF) with full spray at 2500rpm. Engine will choke down and almost die, turn off at this point. Let heat soak for 1 hour. Start and drive for a couple miles and repeat twice (3 times total). Engine will crank longer before starting and will rattle and ping first mile of first cleaning. This method only uses 1/3 can for all three heat soaks. The initial pinging proves that carbon was breaking away after each heat soak. No codes set and 5K mile later (30K). Blow-by from crankcase increases with each acceleration and that is why highway use delays carbon buildup. I am a lead foot with WOT used frequently. I will do one heat soak every oil change from now on. GDI problem handled.

  25. Appreciate another great product but we have avoided these issues by avoiding vehicles with GDI engines. 2011 Jeep Grand Cherokee, 2013 FIAT Abarth, and an old SAAB. All are port injected. FCA seems slow to adopt GDI thank goodness.

  26. I'll never buy a Hyundai/ Kia GDI engine . Too much to go wrong and not worth the maintenance costs.

  27. You need a 10 mm scope cam and some minor tools once you remove the intake manifold. Some vehicles will be harder to clean as the bore is deeper. To pickup the loose bits that your take out manually you need a shop vac with a hose that goes into the intake port. I takes time but yes you can call it the deposits, we just did it to a GM traverse with 150,000 km and it was nasty very nasty. This product is a scam and the deposits still need to be vacuumed out. This product was returned 1 hour after being used as it did not do squat.

  28. What about the turbo? Is all the CRC still going to reach the valves after going through the turbo and intercooler?

  29. I could see this working as preventative maintenance. If you’ve got 150k you’re just going to send carbon through your engine and cat and cause damage. Maybe if you start at 10k and hit it every 10k you might remove the small stuff before it becomes an issue.

  30. If you have a GDI engine, never let the vehicle just sit and idle for long periods of time. This is when most of the deposits occur. When in the drive through shut the engine off, waiting for friends you pick up ect. Another thing that helps is being a little heavy on the gas in first and second, and a good spirited highway drive at least once a week. These are the tips I have read about that seem to make the most sense.

  31. Crc intake cleaner works yes no doubt! But remember friends it doesnt work like bringing the old carbon gunky valve into brand new valve to its genuine life when you once bought a brand new car with 0 miles on it. The only best possible solution to bring old valves into genuine shiny valves life is to use a ground wallnut shells soft abrasive blasting. Trust me on this one. All the world chemicals they might invent but nothing can be purely cleaned with chemicals as compare to manual wallnut shells blasting.

  32. Straight GDI is just a flawed design. Cleaning additives in fuel are unable to reach/clean 50% of what they need to – which is why you have to mate port & direct injection together in a proper GDI engine design (like what Toyota does in their new TNGA Dynamic Force engine). End of story.

  33. Mercury Marine yes the Boat Company has a similar product called "Power Tune" about 10 bucks at your dealer. I use the stuff everyday it also works great as a carb cleaner FSM cleaner I've had it get fuel pumps to working again. Had it bring compression up by removing carbon. Love it and swear by it.

  34. the jury is out GDI engines suck, I regret buying my 2012 Kia Optima brand new now, all these extras steps on top of other services, so annoying, this should have been disclosed and I would have never purchased a car with a GDI engine, I feel ripped off

  35. could someone please show me where to inject the crc product for 2018 Honda Accord LX, and 2019 Honda Civic lx ?

    I want to use this product in my car but I don’t know where to safely deliver this product in my cars.

    I’m so frustrated!

    please help

  36. How do diesel engines get around this problem? I thought they also have a direct injection system since ever.

  37. Any opinion about CRC spray Cleaner for Carbon method?. Bought a 2016 Kia Sorento 2.0Turbo with 68,000 miles, probably had a lot of highway miles.

  38. Is there a list of mechanics so I can have it done to my Mercedes in KY?

  39. just stay away from an engine that was designed to keep the Nox numbers down so the MFGs just shoveled the on to public so that they could sell cars that stayed within the numbers DI & GDI are engines to stay away from or you keep paying out for products to clean up the mess the the manufactures put you into ! /UK

  40. Alfa Romeo, Toyota, and many others are starting tu use a regular port injector just to solve this. VW/Audí owners needs to buy this by the thousands

Leave a Reply

Your email address will not be published. Required fields are marked *