Before I start up my new engine, im trying to prime it with oil, since its been sitting since 1990. Im using an air ratchet with an extension and the hex piece that drives the oil pump. I tried for about a total of 10 minutes, and I'm still not seeing any oil coming to the top at the rockers and valve covers. I already searched and saw a couple things, one was to remove the pump, pack it with jelly, and put it back in. Another was to pour oil down the cam position sensor hole into the pump that way. Whats the best way to go about this? Also, is this normal? Ive read that people usually build pressure fairly quickly, just seems odd that its taking this long.