Very unfortunately, yes, I could ;) (...not right now though.)
But look, if you are trying to understand which noise I was referring to: stop some gasoline cars, from euro-5 on, after the engine has been on for a good number of miles, and after a few minutes you will hear like a "loud bang on metal" (very distinct from the usual crackles from the cooling metal), like a coiled spring loudly released, then after more minutes another one... Even after an hour, or more, it will randomly go on... Silent for a long time, then "bang".
I've got an Euro-5 gasoline car and never noticed anything like that, also when driving other/newer cars, and my office window is to a small parking lot, and there also isn't anything like that happening (I am very sensitive to noises). So I think this must me something specific to a car model.
