Check your wire routing. My '86's buzzer would go off because the back switch wire was routed too close to a spark plug! No lie. This occurred right after the VW dealer replaced the head gaskets under waranty. Van was less than 1 year old. You may have a rubbed through wire somewhere. Jay w/'85 and no damn Dynamic Oil Pressure System!
Richard Stevens <resteven@BTINTERNET.COM> on 08/28/2001 03:36:24 AM Please respond to Richard Stevens <resteven@BTINTERNET.COM> To: vanagon@GERRY.VANAGON.COM cc: (bcc: Jay L Snyder/AE/DuPont) Subject: Re: Oil pressure gauge
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
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