Audi A6 C7 v6 3l tdi black hard mass around exhaust manifold

[AurelijusG]

Hi

Hope someone has some ideas and can help me with the below please? 

Audi A6 avant c7 v6 3L TDI

I have noticed a black splatter around the coolant  reservoir  and top engine cover. Upon further inspection noticed a black mass of more of the same around where exhaust is coming out of the engine.  It is totally solid/hard. What is that? Engine runs ok apart from very rare juddering on cold start and some coolant disappearing overtime. (Like 200mil over a month or two) No leaks of any sort noticed

This black hard mass looks worrying 😞

No loss of power, no overheating, coolant reservoir nice and clean, oil cap clean, no bad smoke coming out of exhaust- none of the worrying bits if you know what I mean? 

Any help would be much appreciated. 

See pictures attached. 

[Magars6]

hello! How did you finally solve the problem? Same thing happens to me in my car...

[AurelijusG]

4 hours ago, Magars6 said:

hello! How did you finally solve the problem? Same thing happens to me in my car...

Hey,  one injector seal has failed and caused the following:

Hot gases escaped through the injector and damaged the plastic manifold and its gaskets which lead to this carbon ‘build up/splatter’

Injector seal replaced with plastic manifold and that was that. It is a pig to remove the hard mass so just left it there as it doesn’t really do anything - just looks unsightly. Hope this helps. 

[Magars6]

Thank you very much for the information, today I will start with the repair. greetings!