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Engine GDI valve carbon build up
- Thread starter Alby
- Start date
Everybody can reduce the risk of carbon build up by installing oil catch cans. I have can installed as a first thing and now the water/methanol Injection kit will be also installed to ellminate that problem completely. There is a MAP-sensor clean-up thread in FB group (MAP-sensor located on the top of intake manifold must be cleaned from time to time because it gets dirty from of oil inside of manifold), I checked mine yesterday and it was clean because of having catch can.
Would be nice to know if the others really are that dirty. Saw some cars before with completely dirty sensors, the one from my last car was like "new" after 100k km. I think there are many differences between different cars.
Yes I believe there was a guy on there the other day explaining how to keep the map sensor clean was an interesting read
Does using V-power help to reduce carbon build-up?
PS What does MAP sensor = ? I thought these cars didn't have a MAF sensor, is that something different?
PS What does MAP sensor = ? I thought these cars didn't have a MAF sensor, is that something different?
There’s a lot of debate wether some fuels are actually “cleaner” than others but fuels like vpower and Tesco 99 have a higher octane level so there better in performance engines. I’m regards to the map sensor maybe, maybe not I’ve never personally ever heard anyone doing this until now.
I can only report from experience that I had with Ultimate102 no residue on the tailpipes. With Ron98 / Ron95 you have already seen black deposits after days. On the other hand, the vehicle is released with Ron95 and was built without catch-can, I suppose that can not hurt the engine so much. hope so.
I can only report from experience that I had with Ultimate102 no residue on the tailpipes. With Ron98 / Ron95 you have already seen black deposits after days. On the other hand, the vehicle is released with Ron95 and was built without catch-can, I suppose that can not hurt the engine so much. hope so.
That’s a good point Hyundai recommend 95 and over and the best fuel i can get in my town is vpower which 99 Ron. I used to to take my gti to a performance garage and they have there own BTCC team and they always recommended vpower.
Carbon build is connected with a fuel we are using in minimal way. Most of that carbon build is caused by way how direct injection engines are working and how "Green" people have been changing the way todays engines are working. Comon "d..khead" is our PCV sytem what is pushing unburned fuel vapours, condence water and some oil back to the engine intake manifold. There is no difference how "clean" fuel you are using - it will be injected straight to the combustion chamber (after intake valves). There are couple of ways to fight against that but they all need some modifications and doesn´t elliminate that problem completely. There are also some fuel add-ons on the market what will help to clean valves but they are not very effective.
That MAP-sensor case is just a result of that stuff what comes back from PCV valve. MAP sensor is basicaly a boost sensor (Manifold Absolute Pressure sensor), what gives information to ECU for making timing adjustments, fueling adjustments by the amount of air going to the engine.
If catch can helps us to reduce the amount of stuff coming from PCV valve, water/meth system helps to keep engine clean (because water/meth will be injected to the engine before throttle body, it goes to the intake manifold (not straight to the combustion chamber) and will help to keep intake valves cleaner.
Small explanation about GDI-engines carbon build here:
That MAP-sensor case is just a result of that stuff what comes back from PCV valve. MAP sensor is basicaly a boost sensor (Manifold Absolute Pressure sensor), what gives information to ECU for making timing adjustments, fueling adjustments by the amount of air going to the engine.
If catch can helps us to reduce the amount of stuff coming from PCV valve, water/meth system helps to keep engine clean (because water/meth will be injected to the engine before throttle body, it goes to the intake manifold (not straight to the combustion chamber) and will help to keep intake valves cleaner.
Small explanation about GDI-engines carbon build here:
They are forced by law to write 95. No cars in EU can be sold without the ability to run 95, even if higher octane is preferable.
My car has 5000km mileage and even without catch can there should not be any signs of carbon build. Those guys who have clecked their MAP-sensors, have noticed some oil on that. I unscrewed mine yesterday and I had no oil or dirt there. The most simple way to check if you have some oil inside of intake manifold, will be if you will disconect rubber hose what comes from front side of rocker cover and check if there is a oil inside of that or not. I installed my catch can when I had 350km mileage and oil was already there.
No my 2015 model Subaru WRX STi was 98 octane or higher only, UK spec car and it was printed inside the fuel filler door.
That is not a new car. If anyone can find a 2018-model sold in EU with 98 octane and up only, please chime in.
you cannot lose your warranty, Must be the 5th i have corrected people, misinformation is bad trait.
If you have a failure with the engine, and they can trace this to a catch can then you claim will be rejected, you do not lose your warranty there,you could still put in claim for say the buttons fell of the wheel etc etc
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I suspect so, in any event I always use the better petrol, V-Power, Tesco 99 or the Costco premium, although it is more expensive it certainly gives better performance AND You use less, so in real terms it doesn't cost more, We are what We eat! Cars are no different, be it fuel,oil or screenwash, buy the best!
Sorry for being thick! Never used a catch can, how do you empty them? Or does it take a really long time to fill them up?