Flight Crew Commercial
Flight Crew Last 90 Days 400; Flight Crew Total 3200; Flight Crew Type 300
Aircraft Equipment Problem Critical
Flight Crew Diverted; Flight Crew Inflight Shutdown
Aircraft
Post Maintenance test flight on J3 Cub with newly overhauled engine.After takeoff; engine oil pressure dropped to 0. Knowing the oil pressure probe was working and calibrated; I knew the engine actually had dropped oil pressure. I shut down the engine for fear of engine seizure and performed an uneventful engine-out landing at ZZZ.It was found that two of the components in the engine were out of tolerance and not overhauled.
J3 Cub pilot reported a loss of oil pressure that resulted in an engine-out landing.