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Date:         Mon, 12 Jan 2004 18:04:43 -0500
Reply-To:     Dennis Haynes <dhaynes@OPTONLINE.NET>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         Dennis Haynes <dhaynes@OPTONLINE.NET>
Subject:      Re: <diesel> oil pressure light at idle/ goes away once engine is
              warm
Comments: To: greg p <purvisgs@YAHOO.COM>
In-Reply-To:  <20040112221449.70789.qmail@web20027.mail.yahoo.com>
Content-type: text/plain; charset=us-ascii

It is probably a bad switch. At higher pressures, oil leaks past the diaphragm inside and gets to the other side, canceling out the switch action.

Dennis

-----Original Message----- From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf Of greg p Sent: Monday, January 12, 2004 5:15 PM To: vanagon@GERRY.VANAGON.COM Subject: <diesel> oil pressure light at idle/ goes away once engine is warm

In my 82 diesel van, the oil pressure light comes on at startup and stays on generally for 1-5 minutes while the engine is cold... As it gets warmer, the light will flicker a bit, and come on at high rpm's, and finally (after 5-10 minutes,) it will not come on at all anymore...

The previous owner told me that "it has done this for the whole time I owned the car".... It was a good deal, so I bought it anyway..... I have not been driving it (much) and when I do, very gently, and I will get a oil pressure guage hooked up as soon as I have the chance, but in the mean time, I just wanted to get some input...

I can't think of a reason why the pressure would be ok at idle/ low rpms and bad only at high rpm's.... It doesn't seem that a bad oil pump would cause this, and I can't really tink of anything in the engine its self that would cause these symptoms. I tried to check all of the wiring, replaced the sensor, I am using a good oil filter (german), good oil, I have checked the place where the sensor screws in for oil flow and I have read everything I can find in the archives.

Next question... can I salvage an oil pressure guage sender unit from any other vw's? I read somewhere online that someone was using one from a scirocco. Before you yell at me for not just going out and buying an aftermarket kit from busdepot, please realize that I am a poor student.

Thank You! Greg

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