My 5.0l valves after 49k miles and after cleaning

[Genesis77]

https://flic.kr/p/XPkscq
https://flic.kr/p/XPkscq

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https://flic.kr/p/Xht3wU

 

[V8vroom]

Wow! What'd you use?

 

[Genesis77]

Used mopar combustion chamber cleaner and let it soak for about 12 hours. After doing this I definitely do not recommend any other way of doing this because so much carbon gets cleaned off and all that gunk would end up in cylinders and cats . And also after seeing all that carbon buildup I installed oil catch can.

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https://flic.kr/p/WBDBUU

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https://flic.kr/p/WDUgSr

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https://flic.kr/p/XFcqz6

 

[JRF1]

Genesis77: What process did you have to go through to get this excellent result? I have a 2012 3.8 and have been running an oil catch almost since new after the concerns I heard with GDI engines and deposit build up . I am still concerned about the carbon and deposit buildup and have been watching this forum for a solution. I have considered the walnut shell process that some have mentioned here, BUT that is fairly involved and requires more tear down of the top end of the motor than I would like.

Any step by step pictures or description of what process you used is appreciated.

 

[Genesis77]

To do what I did removal of the intake is a must . After that I just soaked the valves with a lot of combustion cleaner I used 4 cans for this project. Used vacuum fluid evacuator to suck up all the gunk and dirt and soaked it again after few hours of soaking used tooth brush and cleaned of remaining carbon which was nice and loose. After sucking out all the fluid then I used blow gun and air compressor to get the ports totally clean. Just make sure valves are totally closed in my case 6 of 8 ports were closed so I could clean 6 and then rotated the engine and did the remaining 2

 

[Mark_888]

I don't have a Genesis with GDI engine (which started in 2012), so very unlikely I have much carbon buildup (I use Techron on a regular basis, in addition to high quality gas). But my next vehicle (probably a SUV) will likely have a hybrid engine (no, not electric hybrid) that combines GDI and EFI to keep the valves clean. At the moment, I think the Toyota Highlander and Lexes RS (basically the same designs) have such an engine, but will be looking to see who else adds the hybrid GDI/EFI design to their engines.

 

[celltech]

I put a catch can in my '15 5.0 and get several tablespoons of oil every 1000 miles. I don't know how much it takes to gunk up an engine, but I am glad I am catching it anyway.

 

[Youseethefight]

cant believe how dirty after only49k miles. JEEZ!!!

gdi engines get dirty easily?

 

[Mark_888]

cant believe how dirty after only49k miles. JEEZ!!!

gdi engines get dirty easily?

The problem is that with GDI the gas is directly injected into the cylinder, and does not flow over the intake valves. So the detergent in the gas (or additive like Techron) cannot keep the valves clean. Toyota and some others are now making hybrid engines (no, not electric hybrids) that combine GDI and EFI to have some gas flow over the valves to keep them clean.

 

[Genesis77]

Yes definitely got very dirty and I did use synthetic oil and top tier fuel so that does not help . And of course the best new gdi is hybrid using both port and direct injection.

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Few more pics of dirty valves
https://flic.kr/p/Xht4Qf
https://flic.kr/p/WBDDSw

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[JRF1]

Thanks Genesis77 for the feedback.
That's what I thought since blasting cleaner in through the TB wouldn't do anything based on how GDI works.
I've ordered the Mopar cleaner and will plan to do this process when I reach 100,000 KM (60,000 miles).
I'm only at 62,000 KM right now as the car is only driven in the summer, so I've got some time to go.
I can support what celltech said as well. I get about the same out of my oil catch can, so at least it's cutting down on the amount going back through the system for sure!

 

[Bill K]

Have you been using top tier gas?

 

[Mark_888]

Have you been using top tier gas?

OP said he used top tier gas and synthetic oil.

But top tie gas will not help a GDI (gasoline direct injection) engine where the gas is directly injected into the cylinder, and does not flow over the intake valves. So the detergent in the gas (or in an additive like Techron) cannot keep the valves clean and the back side of the valves get dirty and crusty due to oil deposits.