Ok...this morning was the 2nd time I heard a very loud, horrible sounding noise upon starting my car. The first time I heard it was a few weeks ago, and I sort of let it go because I wasn't sure if it was just a 'fluke'...today I heard it again, and now know that it was not just a fluke. I've never heard a sound like this before...and I can't really describe it other than that it was loud and awful sounding...as if something was seizing up or broke. Both times it happened seconds after I turned the key...it lasted for about 2-3 seconds, then the noise disappeared and all I hear is the normal sound of the engine. Has anyone else experienced this terrible noise upon the first start-up of the day? As I said...it has only happened twice, so it's not a daily occurance. What could it possibly be?