2.0 TFSI Valve carbon deposits

[GarJE]

Hi all,

Thought I'd post up some pictures of what my valves and inlet tract looked like when I recently opened it up. The car has done 50k miles and been run on 98RON minimum since 35k miles (when I bought it). Car is also a 2004, early B7 registration. It has also been on the shortlife service schedule since bought by me using dealer approved (not sure of the grade) oil.

I'm only showing one of the inlets as they were all pretty much in the same condition.

As you can see, the valves are quite heavily coated and the "splitter plate" which sits before them was also heavily coated.

I cleaned them all up with toothbrushes and carburetter cleaner, including the injectors.

Torque, rather than power has improved since.

[warp_speed]

I seen this on US 2.0 FSI engines, it was something about the oil quality and the fact that the FSI means the petrol vapour doesn't come in contact with the valve inlets and hence doesn't clean the oil deposits off the valves. It can be a big problem especially when valves don't close properly. Unsure if the old 15ml of redex down each of the inlet ports and leave for 30 mins would help/work or resolve this issue?

[ukdan]

How was the wear on the valve guides?

[GarJE]

It's the problems many us cars were having which led me to open it up. i'd say that the only chance of getting this stuff is through scrubbing. redex alone won't touch it. valve guide wear seems non existent and oil consumption is what i would describe as normal.