This car is really testing me! So I noticed yesterday that only when the vehicle is fully warmed up and only when I accelerate, or blip the throttle in neutral that it has this slight rattle. And it bothers me. Sounds like it’s coming from the head, but it only does it when warmed up. No noise when I do it on a cold start. Any thoughts? I’ve included a video. Hopefully that will help. 2006 SS/SC.