Seadoo 951 DI Oil Check Valve Test

I received this engine back from the shop rebuilt but the check valves for the oil system were leaking badly. I removed them using a pair of vice-grip pliers and a knocker I made that fits on the end. The valves came right out and were reusable. I cleaned them up and got one working great, the other two were decent but I replaced them with new. I don't think everyone tests these valves to the degree I did. I generally just make sure the pop at around 2 PSI.