Sweet I hope this is the case. I bought a stethoscope off Amazon and next time I hear it I'm gonna probe the VC bolts and see if I can get near the timing cover as well.Mine makes the same noise from time to time; depends on outside temp but it sounds just like yours. When I probed the VC bolts I found out it was coming from a lash adjuster that seems to be getting weak. Threw some sea foam in the oil and it helped it not do it as often but they still have to come out.
It’s a rather embarrassing noise but hasn’t affected performance on my car at all.
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