AurelijusG Posted August 25, 2019 Share Posted August 25, 2019 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. Quote Link to comment Share on other sites More sharing options...
Magars6 Posted April 17, 2023 Share Posted April 17, 2023 hello! How did you finally solve the problem? Same thing happens to me in my car... Quote Link to comment Share on other sites More sharing options...
AurelijusG Posted April 17, 2023 Author Share Posted April 17, 2023 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. 2 Quote Link to comment Share on other sites More sharing options...
Magars6 Posted April 19, 2023 Share Posted April 19, 2023 Thank you very much for the information, today I will start with the repair. greetings! 1 Quote Link to comment Share on other sites More sharing options...
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