Hello again. I sold my megane a long time ago. the man who bought it choco. I bought it shocked and repaired everything. In February 2017, when I got home, I made a tactactac noise in the back of the distribution that had a perfect 5000km. When it accelerates, metallic noise and touched valves. After more than 6 months in a workshop of a friend ... and the noise continues the same. The car starts perfect. no noise at all. when it is heating up, a tactactac starts, which is stronger every time. New turbo, new oil and filter, new distribution. The only thing I see weird is the engine's top tube (gas recirculation) is crushed, intake sucks and something seems to plug. New oil pump. Zero bug in Clip. Tubes and valves revised. No more to look at. No more to do. Thank you