Might be the valve lash, might be the upper timing chain isn't properly tensioned and is slapping the underside of the cam cover.
Without actually hearing it, that's likely where I'd start looking.
And yes, the engine puts out a lot of mechanical noise, so it may very well be what you're hearing. (they tick and rattle like a late '60's British motorcycle 'til you get a good ways up into the revs)
Without actually hearing it, that's likely where I'd start looking.
And yes, the engine puts out a lot of mechanical noise, so it may very well be what you're hearing. (they tick and rattle like a late '60's British motorcycle 'til you get a good ways up into the revs)