While I had all the parts out I made a test fixture to test the "opening point" of the oil squirter "Check Valves" as Toyota calls them. These items are a bolt with a ball bearing held pressurized with a coil spring in the closed position the oil exits similar to the way oil would exit a banjo bolt. If you have been following this thread chances are you know all about them. Heres a photo of a set of new ones.
Most of the ones in good condition seemed to open above 45psi and all seemed to flow at least a small amount as low as 10 psi. Obviously I was testing with air pressure, so it is highly possible they flow nothing until their designed pressure release of above 45psi with oil behind them. Watch the videos I find it very interesting to see how they actually operate when tested.
Heres a photo of my test rig, very simple actually, but seemed to work great.
As promised, here are a few videos of oil squirters used and new. You might be surprised at how they perform.
First video of used Oil Squirter
Video of New Oil Squirter
Video of Good working 130,000+ mile Oil Squirter
Video of 200,000+ mile Oil Squirter Nozzles/Check Valves