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Thread: 0 oil pressure!

  1. #1

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    0 oil pressure!

    Lost oil pressure in my 182A. Flying along minding my own business. Glanced at engine gauges and 0 oil pressure. Made it to Cascade airport with big oil leak and little oil left. Oil pressure gauge line broke. A few more minutes = fried engine and off airport landing. Alot of oil can go thru that 1/8 line. Not good!
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  2. #2
    www.SkupTech.com mike mcs repair's Avatar
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    I think they publish the minimum oil levels without damage.....

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    cubdriver2's Avatar
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    "Optimism is going after Moby Dick in a rowboat and taking the tartar sauce with you!"
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    www.SkupTech.com mike mcs repair's Avatar
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    Quote Originally Posted by cubdriver2 View Post
    you'd be amazed even with the restrictor installed how much of a mess it will make..... no comment on why i know this....

  5. #5
    Steve's Aircraft (Brian)'s Avatar
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    0 oil pressure!

    Quote Originally Posted by mike mcs repair View Post
    you'd be amazed even with the restrictor installed how much of a mess it will make..... no comment on why i know this....
    Yep... had a broken flex line after the restrictor... Man what a mess...

    Brian


    Sent from my iPhone using Tapatalk
    Last edited by Steve's Aircraft (Brian); 08-01-2019 at 09:49 AM.

  6. #6
    cubdriver2's Avatar
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    Quote Originally Posted by mike mcs repair View Post
    you'd be amazed even with the restrictor installed how much of a mess it will make..... no comment on why i know this....
    Yup, mess either way. But one gets me 5x the distance outa the boonies before the prop stops

    Glenn
    "Optimism is going after Moby Dick in a rowboat and taking the tartar sauce with you!"
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  7. #7

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    Why are we still relying on mechanical oil pressure monitor systems?
    Not the first time this has happened and certainly not the last.

  8. #8
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    Quote Originally Posted by Oliver View Post
    Why are we still relying on mechanical oil pressure monitor systems?
    Not the first time this has happened and certainly not the last.
    Explain?

    Whether mechanical or digital gauge is used, oil pressure is measured at the same port. This is dictated by the engine manufacturer. Mechanical gauges use a line to transmit the pressure, hydraulically, to the gauge, whereas digital gauges use a short flexible line to connect the sensor to the port on the engine. (this is done to isolate the sensor from engine vibrations by mounting it on the engine mount or firewall) Either way, a restrictor fitting needs to be installed in the port in order to slow the loss of oil due to a broken line/sensor/gauge.

    Web
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  9. #9

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    Besides a much shorter oil line a digital gauge also has an alert for out of range pressures. I'm pretty sure my Cessna instrument's sender is similar but now I'm going to have to look how it's mounted.

    https://www.steinair.com/product/g3x...essure-sensor/

  10. #10
    cubdriver2's Avatar
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    If I could afford a brand new carbon hotrod with a total glass panel I still on day one when I got it home would install a mechanical oil pressure gauge. If I were allowed only one instrument in an aircraft it would be a wet oil pressure gauge

    Glenn
    "Optimism is going after Moby Dick in a rowboat and taking the tartar sauce with you!"
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  11. #11

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    The 182A uses an oil pressure transducer (Stewart-Warner) screwed into the LH side of the engine (between cylinders 2 and 4) and then only a wire runs inside the cabin to the inst. panel and the S-W cluster gage. (The '57 180 has the same set-up.) One more thing - the early airplanes used copper lines for oil, fuel and manifold pressure and Cessna replaced those in later years with steel lines.

  12. #12

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    Thanks Web for clarifying mounting of electrical sender.
    Another thought, and simple: "t" in an idiot lite switch into the pressure system.
    A red lite on your panel might get your attention sooner than a little bottomed out needle, buy you more time and save an engine.

  13. #13
    wireweinie's Avatar
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    I can agree with that. Easy to do with an oil pressure switch (Hobbs meter switch) and a light assembly.

    Web
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  14. #14

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    I think an annunciator panel would be a cool feature for these older planes - starter engaged, oil pressure, vacuum, alternator ...

  15. #15
    wireweinie's Avatar
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    Quote Originally Posted by 180_jeff View Post
    I think an annunciator panel would be a cool feature for these older planes - starter engaged, oil pressure, vacuum, alternator ...
    They are available if you want them. Check Electronics International's website.

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  16. #16
    wireweinie's Avatar
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    Quote Originally Posted by 180_jeff View Post
    The 182A uses an oil pressure transducer (Stewart-Warner) screwed into the LH side of the engine (between cylinders 2 and 4) and then only a wire runs inside the cabin to the inst. panel and the S-W cluster gage. (The '57 180 has the same set-up.) One more thing - the early airplanes used copper lines for oil, fuel and manifold pressure and Cessna replaced those in later years with steel lines.
    Service kit? I was curious about an electric gauge in an early 182 and went and looked. Can't find a mention in the pre 63 manual and the 77 through 86 manual specifically calls out a direct reading gauge plumbed to the engine.

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  17. #17

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    No, not a kit. See the IPC, which captures factory configuration vs s/n effectivity. Regarding the airframe MM, your 182A wiring diagram w/ oil pressure gage is shown on p. 17-114.

  18. #18
    wireweinie's Avatar
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    curious why they went with mechanical gauges in the later models.

    Web
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  19. #19

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    When prop goes flat, you have lost oil pressure. I know.

  20. #20

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    Quote Originally Posted by wireweinie View Post
    curious why they went with mechanical gauges in the later models.

    Web

    wife and i were driving past the car dealers lot the other day in town and there was rows of new vehicles. i told her look at all those electrical problems looking for a place to happen.

  21. #21
    wireweinie's Avatar
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    Talking

    Quote Originally Posted by tempdoug View Post
    wife and i were driving past the car dealers lot the other day in town and there was rows of new vehicles. i told her look at all those electrical problems looking for a place to happen.
    Ohhh. I know!

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  22. #22

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    Quote Originally Posted by tempdoug View Post
    wife and i were driving past the car dealers lot the other day in town and there was rows of new vehicles. i told her look at all those electrical problems looking for a place to happen.
    I am guessing Cessna was saving a buck. That's all. I prefer to have a sending unit vs. an oil line running into the cabin.

  23. #23
    wireweinie's Avatar
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    What ever blows your skirt up. Advantages to both.

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  24. #24
    Tom3holer's Avatar
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    So how much oil was on the dip stick after landing?

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