Water temp and oil pressure gauges.

Slant 6 Engines

  1. Naplm00

    Naplm00 Well-Known Member

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    if your car came with a oil pressure gauge: yes
    If you car only came with an idiot light: No

    Good news is that you can retain the idiot light AND add an oil pressure gauge. you can get a combo sender that fits in the 1/8npt port on the rear of the engine that the idiot light sender fits into.

    150 PSI Warning Contact 11.4 PSI 1/8-27 30/15 | Pressure Sensor with Warning Contact | Pressure Sensors & Switches | Senders and Sensors | VDO Instruments and Accessories

    just as an example here is VDO sender that can send up to 150 PSI oil pressure and has a warning light at 11.4 PSI that you can use the existing idiot light circuit.
     
  2. Mike69cuda

    Mike69cuda 64 is the new 17 FABO Gold Member

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    I don’t know if there are 10-80 Ohm aftermarket gauges that would work with an oem oil sender. I think most are 10-180 ohms as I recall.

    Probably cheaper & easier to go with matched aftermarket gaugE and sender.

    There isn’t much room on a small block for two senders. It can be done, but pretty hard to avoid vacuum can on distributor.
     
  3. Dartvader440gt

    Dartvader440gt Well-Known Member

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    And this will work with a /6 sending unit near the distributor?
     
  4. Naplm00

    Naplm00 Well-Known Member

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    dont see why not . but my /6 sender is at the side of the block on the distributor side near the rear of the engine


    EDIT: mine is 1/8 npt you would have to check what threads yours is in a different location. they make all different types
     
    Last edited: Aug 18, 2020
  5. 65 Cuda 340

    65 Cuda 340 FABO Gold Member FABO Gold Member

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    I have mechanical water temperature and oil pressure gauges in my 63 Valiant.

    Here's where the water temp bulb is on mine - in the front of the head above the upper heater hose, between the valve cover and the alternator bracket. Been a long time since I put it in, but I don't recall having to drill/tap any holes.

    20200821_085431.jpg

    The oil pressure line hooks to the oil filter adapter in the original idiot light hole. I used to have a T fitting so I could hook up both the gauge and the idiot light, but the T fitting (brass) eventually broke, so I just eliminated it and the idiot light. A steel T fitting probably would probably last forever, but I just haven't bothered.

    As you can see, it took a couple extra fittings to hook up, but they are readily available at most any auto parts store.

    20200821_085745.jpg
     
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    • Dartvader440gt

      Dartvader440gt Well-Known Member

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      Yes, I am going to try to do the oil pressure soon. The water temp was 1/8" npt on the front of my block. Your oil fitting looks to be 3/8" npt going in the block.
       
    • Furyus67

      Furyus67 Active Member

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      This is the first time I've seen a sender like this. Could I use this sender in conjunction with my AutoMeter Z-Series electric oil pressure gauge? Would I be able to retain the use of the factory dummy light connection, and run one connection to the new Oil pressure gauge?
       
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