Hey guys, I've got a 2n headache. Here's the deal, new sleeves, pistons, seals, gaskets, oil pump body (3/4 gears), line bore and machine work, new pick up and relief valve and spring, new valves and everything. Checked crank, cam and all with mic, it's to spec 30/30. New .30 rod and main bearings. Packed oil pump for initial start up, got oil flow from block. Both oil gallery plugs are in. After initial break in I stopped the engine and let it cool. Started it up again, started hearing some noise, no oil pressure, primed through relief hole, low and behold, oil pressure........until I cut it off and let if sit around 15 mins. No oil pressure. I know everything is to spec. Torqued and all. The only thing I can think of is the paper gasket at the pick up isn't sealing and allowing the hot thin oil the seep out and lose its prime. Anyone have any thoughts? I'm running 10w40 for break in. I'm in alabama so thicker oil isn't out of the question either being that we dont know what winter is.