Loud tapping in bank1

[X5M62]

Hey guys been using this forum for years but finally decided to join for 2 reasons. Well yeah the first one is because i need help but i also want to contribute as i know my fair amount. So anyways let me set the stage:
02 X5 4.6is. Got the oil pressure warning engine shut off while driving at 25mph. Got the truck towed and after adding a bit of oil (1/2 q) the engine started making ratle sounds, normal since no oil pressure. Decided to drop the pan and saw guide pieces . So remove upper pan and looking at the oil pick up tube the plug in the back was removed by PO. Essencially by passing the screen. Got to the oil pump took it apart and saw a piece of guide stuck in the gears that seize the pump, and shredded the shaft key holding the sprocket in place. So then i removed the front and changed all the guides, chains, o rings, vanos seals, vanos gaskets, cam sensor, solenoid etc. Also changed the intake gasket, oil circulation hoses and all. Started it and all noise went away and had good pressure. Drove 500 miles and developped a loud ticking on bank1 and got P0012 code. Since both are dependend of oil pressure i tore it down again and verified vanos oil flow from remote filter hoses and channels was ok, checked one way valves, gaskets o rings etc. Took the oil pan off and noticed some stuff in the stainer pick up(minimal atv sealant) so cleaned and put it all back together and tapping still persist and is very loud. Did bleed procedure to no avail. Is there a diagram somewhere that shows the entire oil circuit from the filter to bank1? I did notice that all the lifters on bank 1 are smooshy instead of rock solid like bank2 which is not tappng. I also wondering if removing the pick up tube plug like the previous owner did will allow more oil to flow thru?? Risky but if quiet i am ok ...i m using 10w40 mobil 1. Not sure what to do or check at this point any help is much appreciated