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Sorry but I cannot really tell from your video but my most recent "tapping" sound turned out to be my harmonic balancer coming apart. It started out small and barely tapping and then progressively got worse. That's when I finally figured it out. You cannot see it in the attached video but it most definitely came apart and was making a racket and rubbing a hole in the timing cover. Just look down at the harmonic balancer and see if it looks right. I replaced the harmonic balancer, timing cover, timing chain, timing gear, and for good measure and because of all the debris in the pan, the oil pump. (2002 Z06 with 92k miles) Sorry if this is not your issue but hope this helps somebody.

 

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Timing chain? Sounds like its coming from the front of the motor.
 

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Discussion Starter #7
Timing chain? Sounds like its coming from the front of the motor.
Yeah it definately is coming from the front of the motor. I was thinking lifter, but timing chain is possible. I heard another video on youtube of an ls1 camaro that had the same identical noise and he said his was a crack in the weld on his headers. But mine does not sound like its coming from the headers.
 
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