My darling 4.6 has started to tap quick loudly, it sounds top end and changes with engine speed. IT’s intermittent but more often than not now. It’s when the engine is at temperature and not cold. It goes away briefly with light throttle and heavy throttle, but not medium throttle and I can hear it until the wind noise overwhelms my hearing!
Is this the dreaded slipping liner??? And is that the end of the engine and heads if so?
I’ve replaced cam followers and cam within the last 3 years.
I use decent oil and change frequently….