In a message dated 98-06-29 15:46:34 EDT, Anthony.Kimmons@CHRON.COM writes:

<< Rebuilt engine on 87 vanagon (changed head gaskets, rings, all gaskets
 and hoses, new plugs, wires, cap and rotor)
 Car will idle fine for about 15 minutes, then oil light will start to
 flash
 Everything seems to work and run fine except
 now my oil light and buzzer goes on at about 2200-2500 rpm
 and then kicks off above 2500.

 Picks up fine and never seems to want to die no matter
 how long I continue to drive it with the buzzer buzzing,
 but of course, I never want to drive it very far after it goes on.

 Question is...
         I was not having any oil pressure problems before the rebuild.
 Should I be concerned about the oil pump?
 I am planning on changing the sensors and want to install an oil
 pressure guage. Oil level is normal, no leaks.

 Car will idle fine for about 15 minutes, then oil light will start to
 flash.

 Anyone with suggestions?
 Thanks in advance...
  >>
 Make sure that the oil pressure switch by the crank is the .9 bar switch, and
the one  in the right cynlinder head is the .15 switch. With a hot motor the
oil pressure has to be above 1.0 bar at 2000 RPM or higher, normal oil psi at
2000 RPM is 1.8 bar. If you have correct oil psi, replace the .9 switch.   The
easy check of the .15 switch is to dissable your ignition ( unplug the
connector on the side of the distributor ), turn on your ingnition, the oil
light should be frashing, crank the motor, in only a few seconds the oil light
should stop flashing,,,,,,,,,,  .15 bar of oil pressure is all that is needed
to turn off that light, wich is very little, so cranking alone will build up
enough oil pressure, turning  it off. If everything is OK, then the control
unit inside your instrument cluster is screwed up.
 Good luck, Michael Modl 87 syncro.