Sounds like the push rod is to short, may be worn or a bad cam lobe.
lifter tick or a spun rod bearing
a tapping sound from under the valve covers at any eng.speed. some eng. have adjastable valves but I sugest you use a repair manal for you car type or have a good mecanic do it for you
metallic tapping that becomes faster as the engine speed increases indicates valve tapping. one or more of your valves clearances are misadjusted. to help you find out which one it is cut a small section of hose, put one end to your ear and place the other end on different spots along the rocker arm cover, where the sound is loudest is where the problem valve is. purchase a repair manual for your car for valve clearances and specific valve adjustment procedures.
Maybe, or you have a bad lifter .
It depends on what's tapping. You may have a bad lifter or a valve problem.
could be broken valve collar or you have dropped a valve
A loose rocker arm for a valve mite be a easy fix with a valve adjustment
it maybe a valve is tapping due to low oil pressure. ON MY 91 THE AIR FILTER WAS OUT OF ROUND SO THE REAR OF THE AIR CLEANER LID TAPPED WHEN AIR RUSHED IN...LOOSE PLASTIC...BROKEN FAN BLADE?
Sure, an engine is not a motor but its a common term for engine. That diagnosis is correct! I've found... The Mega Power Valve Treatment is a different way to end that dreadful tap tap tapping. Different because you get a free engine motor tune up with it! Online about it.
Yes, CPR and defribrillation will work on someone with a mechanical mitral valve.
oil consumption, tapping noise (because it is loose), burned valves or valve breakage
first off is the clacking noise when in park as well? if it is it may be a valve tap. you can research a valve tap it is common and usually not a huge problem right away.