Heres a link to the video i made on the way home. YOu will probably have to turn up the speakers ( iPhone mic ). First rattle between 2000-2200 and second is at 3000-3100. The louder you hit the gas the louder it is. but only happens at those RPM ranges. sounds louder in real life and more precise, but this will give you an idea. I wish i had it pointed at the RPM's but i was more focused on drive at the time haha.
Let me know what you think.
BMW E30 M20 rattle issue from Tyrell Thibeault on Vimeo.