hi every 1

hope you can help, have 307cc 2.0l petrol auto engine code 3b rfj, engine oil pressure light on when warm, tapping from top end, unless over 1500 revs, replaced oil filter gen, 10/40 oil sump off oil pick up and gasket changed, im stuck

when car started it taps, then goes quite, once oil hits 100 temp tapping starts, is there any known faults or fixes, or has any one got a clue what engine will fit, or engine code compatible, to keep cost down thanks jay