I had this noise also. Started out faint at low rpms, only under zero acceleration. It was just there when you were steadily cruzing down the highway(60mph) It was not there at idle or full throttle. I drove the car hard for about 7000 miles. then, the rattle started moving up the rpm range. Changed to 3000, then 4000, then 5000. Next the rattle changed to on throttle accell. then a week later a second echo rattle appeared. this one had a lower pitch and it only happened on deceleration. So I had a high pitch rattle on accel and a low pitch rattle on decel. A week later the rattle got intolerable loud(you could even feel the rattle in the gas pedal) It now rattles at idle and all rpms. Using the screw driver method, I placed the sound inside the cam chain cover. I believe that I have broken cam chain tensioners and the rattle is the chain slapping around. One evidence for this is that the initial stages of the rattle were only when maintained a steady speed, this would be when the cam chain is the most relaxed and able to slap around. Can anyone give me a list of all parts and part numbers I would have to buy to replace the cam tensioners and guides - gaskets etc.?
Hope this helps you and me.
Eric
