Honda accord k20 engine tapping?

i have replaced a faullty camshaft and replaced the timing chain and tensioner reset the valve clearances more times than I can remember. But I have this consistent tapping especially when the engine is cold. When I use a stephescope to pinpoint the tapping the noise seems most loud near the engine mounting nearest the front of the engine (timing chain end) you can still hear the tapping when the engine is not but it is not as loud in fact the noise is almost but gone on tickover. Has anybody got any ideas

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