Chain, tensioner and all guides were replaced about 10K miles ago. had the whole engine front off, so all the guides were replaced. then had the heads off too. Was a huge deal and VERY expensive!! I fooishly spent almost as much on the repair as I did on the car, but I figured if I spent the money, I could drive the car for the next 10 years. At least that's the story I told the wife.
the sound lasts for barely a second.
tried to record it on my cellphone. not very good sound, but the tick is at 4 secs into the video
http://www.flickr.com/photos/randys32/sets/72157622890750673/