Top-End Noise?

[bouleric]

Hey all, Searched the archives and didn't come up with any hits...Got back into the Vibe (2003 GT) the other day after a month or so from being in it and took a run to the store (wife's daily driver). I noticed that when applying the throttle under load (accelerating quickly or whatever), there was a sound coming from the engine that wasn't there before. It's a loud ticking noise. It happens under load only, and worse when the engine isn't up to running temp. It's heard most from about 2k-3.5k RPM, but clears up by 5k.The engine's got about 85k kms on it now, and I've never done the 6200RPM-lift-change-bolt replacement (you know what I mean). She still kicks just fine at 6200 all the way to redline though, so I know the bolt is in one piece. Anyone have any clues? Or any questions to ask me to further narrow this down? I dont' think this sound was there last time I was in it, as it's now really bugging me.Thanks in advance, Marc