Hi everyone, quick tech question. Trying to spin the oil pump on a rebuilt 2F to get oil moving through the motor and it feels like there’s a lot of pressure building up in the oil pump to the point that it stops spinning and once stops spinning, pressure seems to be relieved and then it is able to spin again, until it then builds up more pressure and stops spinning. Spinning the pump with a flat head and my drill. Would appreciate any thoughts, troubleshooting, tips, guidance, all of the above before I start tearing the motor apart unnecessarily.