Timing chains
try this link for the symptoms. Sounds like you have already diagnosed it, though, so it may or may not help.
http://www.agcoauto.com/content/news/p2_articleid/115
http://www.agcoauto.com/content/news/p2_articleid/115
Thanks for the info guys. I'm actually more nervous now because it seems like it's always the driver side that breaks and my noise is clearly from the passenger side. Oh well I guess I will find out soon enough.

