Not Ranked
I had a ticking sound on a 240Z years ago and couldn't find out what the problem was. It's an OHC engine of course and uses followers in stead of lifters but even still, I had this ticking I couldn't get rid of. A mechanic at a Z garage found a broken inner valve spring that was the cause. You couldn't see it until it was taken apart but that fixed it. So maybe something to look for on yours.
Larry
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