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Oil Pressure Gauge not so good

Discussion in '40- & 55-Series Tech' started by mattcobb, Nov 3, 2003.

  1. mattcobb

    mattcobb

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    All my gauges on my cluster work fine except Oil Pressure. It looks like (but not sure) that sending unit is connected. Any ideas on troubleshooting / process and repair? Thanks
     
  2. toy974

    toy974

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    do you mean it doesn't work or the pressure is low?
    the sending unit is almost above the oil filter, try to mesure it with a voltmeter

    bye
     
  3. Romer

    Romer fatherofdaughterofromer Moderator

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    My oil pressure gauge doesn't work either. The needle isn't even visible. I got another cluster on eBay and I was going to swap out the oil gauge and see what happens.
     
  4. pvaman

    pvaman

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    it's probably the sending unit -- i replaced mine 100K miles ago.
     
  5. rgentry

    rgentry

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    For peace of mind you should probably hook up a mechanical
    gage to your block (unscrew the sender and tap in there) and
    measure the oil pressure: (1) cold idle, (2) cold 2000 rpm, (3)
    hot idle, (4) hot 2000 rpm. Then you can reassemble your
    electrical oil pressure sender+gage and confidently know the
    correlation between the real pressure and the in-dash gage.

    The OEM gage is notoriously flaky but I would not run without
    any indicator of oil pressure.
     
  6. Romer

    Romer fatherofdaughterofromer Moderator

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    Where is the sender unit and how do you identify it?
     
  7. 73lndcrsr

    73lndcrsr SILVER Star

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    I think the sending unit is usually on the drivers side of the block near the back. I have seen them on the oil filter mount on 78 and later though.
     
  8. Romer

    Romer fatherofdaughterofromer Moderator

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    Turns out mine was disconnected at the sender unit. It was loacted next to the Oil filter on the passenger side. The mechanic who told me where to look for it said if it still didn't work, that I could ground the coonection that is suppose to go to the sending unit and if the wiring and the gauge are working, the needle would peg. Fortunatly, it was just disconnected.
     
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