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View Full Version : Maybe GDI is not such a good thing?



Hipster Lawrence
04-27-2011, 06:34 PM
Reposting these pics from another board. This is a Mazda direct injected turbo. Engine has 87,000 miles.
http://i57.photobucket.com/albums/g209/kmlively/6711fc03.jpg

http://i57.photobucket.com/albums/g209/kmlively/a283bd5e.jpg

It seems that since the gas is injected directly into the cc that the detergents never get a chance to clean any deposits off of the intake valves. The deposits come from PCV and EGR it uses vct for EGR as most engines do these days.

Anyway those of you who have GDI engines do idlnduction services regularly like every 15k. I'd use GM or chryslers top engine cleaner.

Murgatroy
04-27-2011, 06:37 PM
Seafoam it?

Maruki-kun
04-27-2011, 06:39 PM
GDI?




http://images.wikia.com/cybernations/images/1/15/GDI_regular_flag.jpg

Hookecho
04-27-2011, 06:42 PM
Good Lawd!

CollapsedNut
04-27-2011, 07:05 PM
wow

Hipster Lawrence
04-27-2011, 10:50 PM
Seafoam it?

Well seafoam in the tank won't help since fuel will never hit that part of the engine.

I wouldn't take chances with seafoam. I'd use a oem top engine cleaner. Since every manufacturer has GDI at this point I'd assume this will be addressed soon enough.

celicaGTS_T
04-28-2011, 01:46 AM
They should have used Shell nitrogen-rich gas :wiggle:

Murgatroy
04-28-2011, 02:10 AM
Well seafoam in the tank won't help since fuel will never hit that part of the engine.

I wouldn't take chances with seafoam. I'd use a oem top engine cleaner. Since every manufacturer has GDI at this point I'd assume this will be addressed soon enough.

I don't use seafoam in the tank, I use it through the intake.

david in germany
04-28-2011, 06:26 AM
The Minis have the same issue. Step #1 to prevent this is add an oil catch can and block off any other route the pressure can travel other than the catch can route. I empty my catch can at least once every 2 weeks but winter time at least once every week.

david in germany
04-28-2011, 06:32 AM
They should have used Shell nitrogen-rich gas :wiggle:

Would't help even a tiny bit. Direct injection to the combustion chamber. The build up is from all the oil blow from the PVC system and moisture in the engine being recirculated into the intake track and settling on the valves.

celicaGTS_T
04-28-2011, 08:08 AM
Would't help even a tiny bit. Direct injection to the combustion chamber. The build up is from all the oil blow from the PVC system and moisture in the engine being recirculated into the intake track and settling on the valves.

:popcorn:

Hipster Lawrence
04-28-2011, 07:14 PM
The Minis have the same issue. Step #1 to prevent this is add an oil catch can and block off any other route the pressure can travel other than the catch can route. I empty my catch can at least once every 2 weeks but winter time at least once every week.

That will help. But you can't do anything abou reversion due to overlap. (EGR).

Nitro_Alltrac
04-29-2011, 03:53 AM
That's something I've never thought about with GDI. That is something that the OEM's are going to have to address.