Valve train noise of the month....PLEASE HELP

[300bucks]

Finally put an exhaust on the other day (2.5 form down pipe back ) and it drives great. Unitll today I started to notice a slight ringing noise coming from what sounds like the back of the valve cover. So I pulled the cover and noticed nothing except for a little play in the timing chain. It sounds as if a bolt is loose some where with a washer on it and it is jingiling around.. Any Ideas? engine only has 95k on it.. Thanks

[s13sr20chris]

any heat shields rattling? how loud is the ring noise? quiet like a solenoid operating fast or loud like a belt squeal? of course the belt squeal would no be from the back. sometimes a vac leak can sound that way.