Hello Guys and Gals, I have a 2003 camry and its making a rattling noise alsmost like loose valves, but its not the valves. I have checked everything i could think of for looseness, fit, exhaust,etc. Car has 115000 miles and runs excellent, the noise does not affect its performnace, but is a aggaravating noise almost like a diesel engine makes. anyone out there have a similar issue? Im thinking maybe something has come loose in the exhaust, maybe in the cat? help.. and thx so much in advance to all