Here is a company involved with cleaning GDIs

http://www.bgfueltest.com/

http://www.bgprod.com/products/fuelair.html

 

QUOTE (Ranger x @ Apr 27 2011, 08:17 PM) index.php?act=findpost&pid=436865

What will be needed to prevent this? Im thinking SeaFoam every oil change in the intake.

That seems a little extreme to me. I have seafoamed many of my vehicles, but would be cautious on any newer engine because of all the added sensors. I would think seafoaming the intake every oil change would cause your spark plugs to foul quicker. I would stick to the fuel treatments (adding seafoam to a tank of gas) and not worry about it for now. Really we won't know if it's a problem or not until we get some high mileage Sonata's out there with this engine (but we do have a nice warranty to cover us, hopefully).

 

QUOTE (Newport Ohio @ Apr 27 2011, 09:58 PM) index.php?act=findpost&pid=436935

That seems a little extreme to me. I have seafoamed many of my vehicles, but would be cautious on any newer engine because of all the added sensors. I would think seafoaming the intake every oil change would cause your spark plugs to foul quicker. I would stick to the fuel treatments (adding seafoam to a tank of gas) and not worry about it for now. Really we won't know if it's a problem or not until we get some high mileage Sonata's out there with this engine (but we do have a nice warranty to cover us, hopefully).

+1

maybe 1ce every other year.. doing it that often and your going to do more harm than good

also out of boredom i pulled my spark plugs out at 8000 miles and they were very clean, i wouldn't worry.

 

keep your maintenance up to date with regular oil changes and u'll be fine. those audi guys have those issues because they have a crappy evap system.

 

QUOTE (yayo @ Apr 28 2011, 02:07 AM) index.php?act=findpost&pid=437039

keep your maintenance up to date with regular oil changes and u'll be fine. those audi guys have those issues because they have a crappy evap system.

Ding! we have a winner. Almost every single time these issues are caused by egr and pcv system issues. If you keep the exhaust gas from being recirculated, and a good pcv system in place, these clogged valve problems completely disappear.

 

If your worried about carbon build up in the intake as a result of egr's and especially pcv's just put an air/oil separation can in line with the crank vent, problem fixed!

 

QUOTE (youpers @ May 1 2011, 11:56 PM) index.php?act=findpost&pid=438704

If your worried about carbon build up in the intake as a result of egr's and especially pcv's just put an air/oil separation can in line with the crank vent, problem fixed!

I can say, if the PCV system is poorly engineered, catch cans offer little help in the long run. Yes, they will "capture" massive amounts of water and gasoline mixed with oil, but it is a small portion of what is really running through them. Another point of contention to worry about would be the oil return line coming from the turbo, hopefully this is adequate enough to allow a full return flow without seeping past the turbo seals and causing smoking issues, but thats another story we will need to wait a while before it may or may not crop up

 

QUOTE (pcguy @ May 2 2011, 12:18 AM) index.php?act=findpost&pid=438726

I can say, if the PCV system is poorly engineered, catch cans offer little help in the long run. Yes, they will "capture" massive amounts of water and gasoline mixed with oil, but it is a small portion of what is really running through them. Another point of contention to worry about would be the oil return line coming from the turbo, hopefully this is adequate enough to allow a full return flow without seeping past the turbo seals and causing smoking issues, but thats another story we will need to wait a while before it may or may not crop up

agreed if we were talking about ebay catch cans, but thats not what I said, catch can is not the same thing as air oil separator. Not much if anything gets past an air oil separator. BTW water and gasoline are not a part of this system, so... what are you talking about?

 

QUOTE (youpers @ May 2 2011, 01:43 AM) index.php?act=findpost&pid=438731

agreed if we were talking about ebay catch cans, but thats not what I said, catch can is not the same thing as air oil separator. Not much if anything gets past an air oil separator. BTW water and gasoline are not a part of this system, so... what are you talking about?

gasoline is present in the crankcase due to blow by during high boost. Water is also present due to condensation, and as a byproduct of combustion.