Recently rebuilt my engine,once we had completed engine I have experienced no oil to the top end of the rockers. I have pulled oil pump to ensure that there is no blockage and all is clear. Also have replaced push rods all seals in pump new gaskets and still can not get oil to the rockers nor is oil returning to tank.Oil pump is in good condition with minimal scaring.All gears in pump assy also in good shape. Unable to find ANY ISSUES WITH ANY OF THE ASSY. Please inform if you have experienced this type of problem. Thanks 9RRYDR. .