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Date:         Wed, 6 Oct 1999 19:08:06 -0400
Reply-To:     Jim DiGennaro <limbo@BCN.NET>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         Jim DiGennaro <limbo@BCN.NET>
Organization: LiMBO, Late Model Bus Organization, International
Subject:      Re: Vanagon  oil pressure switches,or the lack thereof!!
Content-Type: text/plain; charset=us-ascii; x-mac-type="54455854";
              x-mac-creator="4D4F5353"

I pulled my hair out on friend, Julie Olsens, Syncro camper just after I installed a new engine in her bus. First a brief explaination of how the system works. The system has two sensors. Sensor one, is located between the pushrod tubes of number 3 and 4 cylinders. This sensor is grounded when the oil pressure is under about 7 pounds. This turns the light on when the key is on but the engine is not running. Sensor two is located under the water pump between the oil filter and oil pump. This sensor is grounds itself out at pressures over about 18 lbs. There is a control unit mounted in the speedometer and it also senses engine RPM. THe control unit looks for system pressure from sensor one up to 2000 RPMs. Then the control unit looks for sensor 2 to be grounded out. (a quick test to see if the sensor is working, hook a test light to a power source and then probe the wire from the sensor, rev the engine briefly, the test light should light) As soon as the control unit looses ground from sensor two and the engine RPMs are over 2000 the light goes on and the buzzer flashes. Now both sensor wires run to a connector near the thermostat housing. On julie's bus it was wire tied to the coolant hose. This cause fatigue on the wires from 170 thousand miles of engine movements. A couple of new connectors cured her problem. I'd bet the same for you. Good luck. -- ------------------------------------------------------------------------ -Jim DiGennaro LiMBO, The Late Model Bus Organization, international zzzzzzzzzzz_ |E[__] [__]|[_]\\ | _ LiMBO | _ || =-( )---------( )--= '84 Green Westfalia, 'The Turtle Van' James Digennaro, LiMBO's Editor and Web master. 34 Summer St., Adams, MA 01220 ICQ# 5534528 LiMBO LINE: (413) 743-1814 URL: http://www.bcn.net/~limbo/ 'Transporters By The Tunnel' - A fun camping event ' held in July ------------------------------------------------------------------------


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