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The Official "What The Heck Is This?" Thread

Discussion in 'Early CJ-5 and CJ-6 Tech' started by Focker, Feb 19, 2016.

  1. Oct 15, 2018
    Oldriginal86

    Oldriginal86 Member

    Pasadena, Md.
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    Manual as opposed to electric gauge uses a bulb emmersed in the coolant that is soldered to a small copper tube filled with a liquid that expands when heated. Also called a mechanical water temp gauge. Typically more accurate then an electric gauge.
     
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  2. Oct 15, 2018
    tripilio

    tripilio Proud American!

    Miami
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    (y)
     
  3. Oct 16, 2018
    timgr

    timgr Jeepin' Nerd Sponsor 2019 Sponsor

    Medford Mass USA
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    Not manual, mechanical (as Pasadena wrote). "Manual gauge" is a misnomer, like oil "galley" for oil gallery. Mechanical, as opposed to electrical. Not manual - there are no hands involved. The mechanical gauges use the force generated by the measured quantity to display the current value. This is done with a "Bourdon tube." Pressure measurement - Wikipedia These are pressure gauges - a mechanical oil pressure gauge measures the pressure directly by piping the oil directly to the gauge. A mechanical temperature gauge uses an intermediary, say alcohol, in a bulb immersed in the coolant. Changes in vapor pressure from the changing temperature moves the pressure gauge, indicating temperature.

    Note that a mechanical temperature gauge is a sealed system - you cannot shorten or lengthen the cable. Cut the cable (actually a long tube) and the gauge is ruined.
     
    Last edited: Oct 16, 2018
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  4. Oct 16, 2018
    J.P. Thal-Larsen

    J.P. Thal-Larsen New Member

    Potomac, MD
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    You learn something new every day!
    Reminds me a little bit of mechanical vs electrical when it comes to the thermocouple to a gas regulator (another misnomer: "thermocouple" not "thermocoupler"). I couldn't for the life of me figure out how the regulator was getting its signal from the pilot until I read about how a thermocouple works.
    When my "Is anyone familiar with this..." post was moved to this thread, where my question was promptly answered, I thought I was going to be done with this thread.
    Not the case!
     
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  5. Oct 16, 2018
    tripilio

    tripilio Proud American!

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    Do I need the mechanical sender unit in addition to the one in the side of the block or is an alternative? Is one better that the other?
     
  6. Oct 16, 2018
    timgr

    timgr Jeepin' Nerd Sponsor 2019 Sponsor

    Medford Mass USA
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    Year/model? Likely the factory sender is in the block, and is used with the factory electric temperature gauge. If you want to install another mechanical temperature gauge (aftermarket), you buy the gauge and sender as a unit, connected by tubing. Separate them and you ruin the whole thing. Like this-

    upload_2018-10-16_13-28-12.png

    https://www.summitracing.com/parts/sww-82326-60/overview/

    The original electrical gauge, in working condition, is sufficient IMO.
     
    Last edited: Oct 16, 2018
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  7. Oct 16, 2018
    Cap-n-Cray

    Cap-n-Cray I want to do this again.. Staff Member Sponsor

    Bainbridge...
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    I have an outside temperature gauge for my 912 that works like this...
     
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  8. Oct 16, 2018
    tripilio

    tripilio Proud American!

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    62 CJ5 4-134 engine, 27 front and 30 back, T90 transmission, no floors.
     
  9. Oct 16, 2018
    PeteL

    PeteL Member Sponsor 2019 Sponsor

    Hills of NH
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    For temperature, sure.

    But perhaps worth mentioning here that I prefer a mechanical gauge for oil pressure, since it responds almost instantly, unlike electrical gauges.

    This can warn of up critical issues that an electrical gauge misses.
     
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  10. Oct 16, 2018
    tarry99

    tarry99 Member Sponsor

    Northern California
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    So do I ..............although some of the modern electronic gauges are quite reliable , although In the race car everything has a mechanical gauge...Oil , fuel , vacuum, water & brake pressures.........Fuel pressure is connected to a diaphragm outside of the cockpit that in turn pushes a non flammable liquid to actuate the gauge inside...........all of these sensors also run into a block that connects to the Data Recorder on the opposite side of the firewall.
     
  11. Oct 20, 2018
    Buildflycrash

    Buildflycrash Member Sponsor

    Gulf Breeze FL...
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    Is this a regular open differential? Limited slip?

    Condition looks good to me.

    [​IMG]

    [​IMG]
     
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  12. Oct 21, 2018
    tarry99

    tarry99 Member Sponsor

    Northern California
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    Open..............No Limited slip there.
     
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  13. Oct 24, 2018
    tripilio

    tripilio Proud American!

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    Can Can anyone tell me if I need a carb spacer? I read about it around here that improves the mixture, and also, what is the purpose of this line in the intake and can I tap into it if I need vacuum for a brake booster? Thanks! IMG_20181024_075507889-1305x734.jpg
     
  14. Oct 24, 2018
    PeteL

    PeteL Member Sponsor 2019 Sponsor

    Hills of NH
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    Engine (manifold) vacuum. It supplements the vacuum pump from its output side and reduces cycling of the pump diaphragm & spring when demand is low. Conversely, the pump kicks in when engine vacuum is low, such as going up a hill.

    You'd get the benefit of both if you tapped on the intake side of the pump rather than from the manifold. Check your FSM, it's all in there.

    Before that, you need some plug wires.... and maybe a water pump?

    My understanding of the carb spacer is that it is a heat isolator, and seems to be optional.
     
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  15. Oct 24, 2018
    tripilio

    tripilio Proud American!

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    Plug wires are overrated...:D
    And I am still in the tub restoring phase, but since the part I enjoy the most is the mechanic side, I am learning and foreseeing so I can be prepared with knowledge and hopefully the parts to do so when the times come. A follow up question..which vacuum pump? I don't think my engine has one. Is an f134 on a 62 cj5.
     
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  16. Oct 24, 2018
    PeteL

    PeteL Member Sponsor 2019 Sponsor

    Hills of NH
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    The vacuum pump on the other half of the fuel pump that true jeeps have. :D

    Check your FSM. You do have an FSM, right?
     
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  17. Oct 24, 2018
    tripilio

    tripilio Proud American!

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    I think I do. I have a pdf of a manual. Is this the one? Screenshot_20181024-155756.png
     
  18. Oct 24, 2018
    PeteL

    PeteL Member Sponsor 2019 Sponsor

    Hills of NH
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    Looks about right!

    Check the "fuel system" for combo fuel and vacuum pumps. I'm not sure when they went to a fuel-only pump, but I assume that was when vacuum "top" wipers were replaced by electric ones at the bottom of the w/s.

    BTW, checked my '49 brake booster today. No tags visible, but it is a Wagner unit. I'll post pics on your brake booster thread.
     
    Last edited: Oct 24, 2018
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  19. Oct 24, 2018
    tripilio

    tripilio Proud American!

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    Thanks, PeteL!:beer:
     
  20. Oct 30, 2018
    FD Engine 1

    FD Engine 1 New Member

    Tennessee
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    9571F505-DA85-4BA8-B433-588F313922EA.jpeg Rear bumper extends 3” further out on the left side than on the right. I’m assuming that’s not factory, right
     

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