X156 Intake manifold and valves carbon cleaning. What did you do and what does the dealer offer?

MadDogMark said:

Have a can of CRC Turbo and Intake Valve cleaner sitting on the shelf. Will do this next week. Thinking of routing the spray into the MAP sensor at the rear of the intake near the firewall, post intercooler.

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Sounds interesting and hope it goes well. Any plans or ability to take before and after pics of the valves or any way to measure the effects?

I ordered a Depstech 3.9mm super slim endoscope to see if I can look at the valves through where the partial load ventilation (PCV check valve) line connects to the manifold (same place where my Weistec ASV pressure control line ties into). I have an older Depstech endoscope but the camera tip is over 8mm wide and won't fit in the port. Only downside to the super slim endoscope is that it only has a forward facing camera. However, Depstech does make another endoscope, the WF070DL that is a dual lens and only 5mm wide (0.2"). That might just be thin enough to fit into the port and be able to see more due to its side camera as well.
Anyhow, at some point in the next few weeks, I hope to be able to get some pics of the valves and see if they are gunked up or not.

Let us know how it goes.
Thanks

Vladds said:

It seems like this is a 2 speed system and that at WOT it sniffs the fuel vapor and the same time as the oil vapor, in the attachment by B4/4 in the diagram.
If I have this right, then the comment somewhere in this thread that referenced an Italian Tune Up for this engine, to avoid gunk build up, makes now perfect sense.
You floor it, starts to gulp fuel vapor, cleans everything..

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gbarringer said:

One thing that helps in prevention is the injectors are clean. This creates an even spray inside the cylinders to better burn the fuel, which will reduce the carbon build-up. Using 91 tier-one fuel plus a can of Chevron Tecron every three thousand miles helps.

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I just put the Techron in the tank, granted I see I let it go 5k since last, but I do this. I usually wait until there is only 20 miles showing and it keeps bugging me about nearest gas station. I then put 9 gals. or so in, so maybe 11 in tank since the bottle I buy is good for max. 15 gals.

sam45AMG said:

Anyone had this done yet or have found any other information regarding this?

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You should re-read the quote I have from Vladds, I think he is at least onto something here. My Pontiac Solstice Coupe 2.0 DI has an aftermarket catch can with a little glass view, but most likely because the car only has 8700 miles on it, I've never had to clean the little catch can box. But it seems like it's not dumping lots of gunk, and so that goes back to Vladds post where it appears our motors are catching Oil, Crankcase Ventiliation?, Fuel Vapor? But does it then just sit there? As it accumulates, is there a secret AMG procedure to clean this every oil change, or....what about that "tank purging line" ? We know that does not just drop stuff on the ground/atmosphere.

Shadofax said:

My Pontiac Solstice Coupe 2.0 DI has an aftermarket catch can with a little glass view, but most likely because the car only has 8700 miles on it, I've never had to clean the little catch can box. But it seems like it's not dumping lots of gunk, and so that goes back to Vladds post where it appears our motors are catching Oil, Crankcase Ventiliation?, Fuel Vapor? But does it then just sit there? As it accumulates, is there a secret AMG procedure to clean this every oil change, or....what about that "tank purging line" ? We know that does not just drop stuff on the ground/atmosphere.

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Reminds me of the catch can I installed on my 2005 Mazda RX-8 as I never once had to clean it out. Modern engine design may be fully recycling and burning off vapors, as they're intended to do (so were latter 20th century designs, but then not so much). Of course that Wankel burned some oil by design so perhaps better than most in this regard.

You can clearly see gunk building up on the valves. I have no idea if it is getting better or worse than when I purchased the vehicle. It has about 54K miles on it now and I purchased it with 26K miles a few years ago. I only use top-tier rated fuels and change the oil twice a year or less than 6k miles. The oil that has been used since I purchased it has been dealer 5W-40 Mobil1, Redline, Castrol 0W-40, and High Performance Lubricants 0W-40 Super Car Engine Oil, and the current fill is Castrol 0W-40 (changed last weekend).

What I can tell you is that when I removed the PCV (where the BOV tap-in point is) hose from the intake manifold, I did see some wetness from oil since this line is part of the PCV system, so oil does appear to be going into that area.

MadDogMark said:

Have a can of CRC Turbo and Intake Valve cleaner sitting on the shelf. Will do this next week. Thinking of routing the spray into the MAP sensor at the rear of the intake near the firewall, post intercooler.

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Mad dog,
Did you ever get around to this? If so, how was the process and the results?
Thanks