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...
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