[Healeys] oil pressure

[James Shope]

with it getting hotter and hotter each day here in vegas, i have watched my
oil pressure drop down to almost zero when idling after the oil has gotten
very hot.  i suspect the oil pump but i removed the valve cover to check
pressure at idle.  oil is coming out all of the rockers as normal, and when i
loosed the oil feed nut on the rocker arm, oil shot out all over my engine bay
at what i considered a very good pressure.  any idea what could be the
problem.  have checked bearings and they are in excellent shape.  could it be
the oil pump or something wrong in the oil distribution system?
healeymanjim