I too have an oil = pressure alarm "fault". With my T25 1989 2.1l the alarm blips in around the 2000 = rpm mark and can be instantly reset if the revs are increased above 2k. The oil = pressure has been checked by two independent garages and both confirm that the = pressure is "within limits". As a precaution the pressure switches have been = changed on two occasions.The circuitry has been checked and is said to be OK. I = have checked against the Bentley manual and yes its OK but the fault is still = there. There have been many other T25s with similar faults  listed = but as yet I have not seen any solutions, in the meantime it is very annoying to = say the least. Somebody somewhere must be able to shed some light in rectifying = this problem! I did read in a magazine, issue three of VW Camper and = Commercial, that if the crankshaft end float exceeds .007 thou then there can be a = catastrophic pressure drop but without  removing the gearbox and freeing up the = crank to measure the end float how else can one check?
The problem remains = but in my case it has been intermittent for about a year now and the engine is = still going
 
 

Regards.
Richard Stevens

-----Original Message-----
From: = Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf Of Moritz, = Thomas W NWW
Sent: 28 August 2001 00:02
To: vanagon@GERRY.VANAGON.COM
Subject: Oil pressure gauge

Our 0.3 bar pressure gauge is bad.  We drove = about 200 miles with the oil pressure indicator light blinking and getting = progressively worse but not a peep out oil pressure warning buzzer.  I made = sure the buzzer was still operating by pulling apart the electrical connector = where the pressure switch leads tie into the wiring harness, revved the engine = to 2000+ and bzzzzz.  Then I made a short jumper with 1/4" spade = connectors and connected the 0.9 bar switch back into the circuit.  This kept = the oil light from flickering all the way back home.  I felt safe doing = this assuming that the buzzer and oil light would warn me while driving = down the highway above 2000 RPM.  This assumes that I don't have a massive = failure of the oil cooler or filter that blocks all flow to the engine bearing.

My question is, if I can operate the vehicle without = the 0.3 bar pressure switch connected into the circuit, why can't I just = replace that pressure switch with a sender?  Is a sender without an integrated = pressure switch small enough to fit in where the pressure switch is = currently located?  Assuming I pay at least as much attention to the gauge = as I do to the red idiot light, am I putting our engine at risk by doing = something like this?

Thanks,

Tom Moritz