I recently dropped my plane off for an annual. We found a crack in the accessory case and pulled the engine and installed a new accessory case. My plane did have an inverted oil system we removed the system and also replaced all the fuel and oil hoses firewall forward. Today we tried to fire up the engine with no luck. I spun the prop with the mags off and we got no oil pressure. We hand spun the prop and filled the hoses and the cooler with oil with no luck. An engine rebuilder told us he has to spin the prop for 10 minutes to get oil pressure. We also replaced the vetherman valve (Spelling) while we had the engine out due to wear on the valve. Does anyone have any ideas? Thanks a bunch,
Jason
Jason