The easy way to the rear sensor is to remove the water pump pulley. A dep
socket can then be used to remove and replace the sensor. Again, be sure to
use the correct one, .9 Bar.

Dennis

>From: Jim Felder <jim.felder@GMAIL.COM>
>Reply-To: Jim Felder <jim.felder@GMAIL.COM>
>To: vanagon@GERRY.VANAGON.COM
>Subject: Re: OIL warning light up
>Date: Wed, 23 Jul 2008 09:02:48 -0500
>
>Zoltan, just wait till you see where those sensors are and how hard they
>are
>to get to.
>Do this: find the plug between the brown sensor wires and the wiring
>harness. It's a two-connector plug in the vicinity of the thermostat
>housing. Take it apart and clean the contacts. Also clean the connections
>at
>the sensors. It's 90 percent likely that your problem will be solved. If
>that doesn't do it, replace the sensor by the water pump first. You'll have
>to pull back the rear tin.
>
>Jim
>
>
>On Wed, Jul 23, 2008 at 8:38 AM, Allan Streib <streib@cs.indiana.edu>
>wrote:
>
> >  "The Westy man" <thewestyman@GMAIL.COM> said:
> >
> > > OK, I will check the pressure then change the switch if I have to.
> > > 140k on engine, compression is very good, engine quiet, smooth.  And
>it
> > only
> > > comes on when I push it up to 2300.
> >
> > There are two separate oil pressure alarms.  One is triggered by the
> > sensor on the crankshaft oil journal, on the bottom left side of the
> > engine.  It illuminates the oil pressure lamp (but not the buzzer) if
> > the pressure falls below 0.3 bar at any time.
> >
> > The other circuit flashes the lamp and sounds the buzzer if the pressure
> > falls below 0.9 bar with the engine above 2000 RPM.  It is located sort
> > of under the crank pully, kinda tricky to get at.
> >
> > It's not unheard of for the wrong sensor to be installed.  My van had
> > the buzzer problem after it warmed up; turned out that there was a 1.8
> > bar sensor installed instead of the 0.9 bar.
> >
> > Good luck.
> >
> > Allan
> > --
> > 1991 Vanagon GL
> >