A few months ago I had the VW dealer perform the upper intake valve cleaning ritual on my 08 2.0T at about 95K, I understand this is related to our engines being direct injection and the fuel and fuel additives in the fuel do not flow over the intake valves to help keep them clean. A catch can system can help reduce this problem but they can be expensive and require some minimal reconfiguration of the PCV system.
What pondering has been given to a way to clean the upper intakes periodically like every 5K miles in a way that is not harmful to the engine and can easily be done at oil change intervals?
Here is what I have been thinking about and looking for opinions of my fellow Passat owners.
Can the PCV hose going into the intake be disconnected and will the car run with this hose off?
If the PCV hose going to the intake can be removed, can something be sprayed into that opening like Seafoam or Techtron Fuel System cleaner without harming the engine while it is running?
If you put something like the above two products into a device that would spray out a fine mist, maybe an airbrush spray gun, could you possibly minimize the carbon build up on our engines?
Feel free to tell me you think I'm crazy or if this idea has legs????