I need some help with a Ford 4.0 V6 that my son is working on. He had the oil pan, intake, and flywheel off of it. It is on an engine stand and he rolled the motor upside down and this part fell out. He doesn't know where it came from. Can any of the Ford guru's on here tell me what this is and where it came from? The only thing I can think of is a pressure relief for the oil pump. But where did it fall out of?