My 2001 4.6 P38 has low oil pressure and a knock at hot idle; I'm trying to determine what to do next. I just put it back together after replacing the timing chain, oil pump, and rod bearings. The rods didn't look bad at all and the oil pump wasn't cracked like some people have experienced. I replaced the o-ring on the pressure relief valve while I had the front cover off as well. I've looked up at the cam and all the bearings are where they should be, none have "walked out". Here are the oil pressure numbers:Cold (idling @750) = 23psigCold (@2000) = 43psigHot (idling) =3psigHot (@2000)= 22psigI'm running Mobil1 5W40Should I go ahead and pull the motor, or do you think I should try replacing the main bearings with the motor in and see if that fixes my oil pressure problem?