Hello guys, I’m new here and I wanted to describe my problem right away. I drive a 407 Coupe 3.0L petrol engine, built in 2006, 108,000 km down. For some time now the engine has been making a loud, metallic noise when the engine is cold. When I start the engine you hear these sounds for 2-3 seconds and then it’s gone. When I put the engine out again and start again, the noise is no longer there. Only when I start the car again in such an hour, it makes us feel r the noise. When driving everything is ok. No power loss or anything else. My buddy is a car’ler and said that the hydro shocks should be. We then changed all 24 pieces, which was not cheap (á 24,95 EUR), but the noise did not disappear. Then he possibly meant the oil pump. But it was not. Then we checked the tensioning rollers of the belt, but it fits everything. And now he stands on the hose and doesn’t know what that can be. The problem k And until the next start we have to wait about an hour until the sound comes back. Before I go to my friend and keep many Euros out of the window, I wanted to hear your opinion or if you already know the problem or one of you already had the problem or what that can be. Thank you already in advance.