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Thread: Oil Temp High

  1. #1
    nesincg's Avatar
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    Oil Temp High

    When we built the baffling I decided not to add the oil screen cooler as I think that just fools the temp probe that the oil is cooler. I can't find it right now but someone did a thread where they put the oil probe somewhere else. I'm running right at redline here in the desert and two questions.

    1. Can I do anything to run cooler? I have put the mixture in different positions and that doesn't seem to help much.

    2. Will it damage the engine to run it just below redline for an hour at a time?

    We are having to stop by 11 and sit in the FBO for hours.
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    The aviator formally known as 89.

  2. #2
    nesincg's Avatar
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    Just an FYI. Tom Ford has a full on oil cooler and he is running pretty darn high too.
    The aviator formally known as 89.

  3. #3
    Cub Builder's Avatar
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    Looks like you still have good oil pressure. You're not going to hurt the engine. If you have sufficient HP to get up to higher altitudes where it's cooler (probably 8500' or higher) the temp will eventually drop down a bit once you are in cruise, but it may not be worth the climb. Keep running the engine lean. Running rich will put extra fuel through it (while crapping up your plugs and oil) and cool the CHTs a few degrees, but won't make much of a difference to your oil temp.

    Keep enjoying the trip. Wish I had the time. I would have flown down to Deming to meet you guys this morning. Let me know if you travel a bit farther north on the return trip. I've always got hangar space for at least 1 plane and would love to fly along with you for a bit.

    -CubBuilder.
    Last edited by Cub Builder; 06-30-2014 at 05:08 PM.

  4. #4
    btracy's Avatar
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    Fly higher. Hard to air cool an engine when ambient temperature are 100 plus

  5. #5
    cubdriver2's Avatar
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    Chris 200 is not that high, My 4 is at 210 when ever it's above 85F with W100. The 0200 Pa11 I learned to fly in was 225F all summer

    Glenn

  6. #6
    RaisedByWolves's Avatar
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    I was in my super cub, was running 240 at 2300rpm. It was 107 out. But it's a dry heat.

  7. #7
    behindpropellers's Avatar
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    PA-81-95 I flew was 225 most of the time when it was over 80.

  8. #8

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    What power plant are we talking about?

  9. #9
    RaisedByWolves's Avatar
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    Chris has a c-90-8

  10. #10
    Steve's Aircraft (Brian)'s Avatar
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    I have over 200 STC'd oil coolers sold because of high oil temps in the small continentals.... That being said, the system is not for everyone. But it does work.

    Brian

  11. #11
    RaisedByWolves's Avatar
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    Quote Originally Posted by Steve's Aircraft (Brian) View Post
    I have over 200 STC'd oil coolers sold because of high oil temps in the small continentals.... That being said, the system is not for everyone. But it does work.

    Brian
    How's it work with a C-90-8 they don't have the oil filter provision on the left side?

  12. #12
    nanook's Avatar
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    I was going to say....mounting the oil filter adapter on my old C-85 dropped the oil temp a bit....

  13. #13
    nesincg's Avatar
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    Quote Originally Posted by Steve's Aircraft (Brian) View Post
    I have over 200 STC'd oil coolers sold because of high oil temps in the small continentals.... That being said, the system is not for everyone. But it does work.

    Brian
    I'm not seeing how that'd work on my -8 engine.
    The aviator formally known as 89.

  14. #14
    Steve's Aircraft (Brian)'s Avatar
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    Air Wolf makes a remote oil filter that will work with a -8.... It is way more expensive than the F&M, but it does work with the oil cooler STC... My STC calls for any approve oil filter system, it is not regulated to just the F&M....

    Brian

  15. #15
    TirolCub's Avatar
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    What Oil do you have in your engine? Shell says that with multigrade oil (15W50) the engine runs in most cases cooler.

    From the Shell Homepage:

    Will my oil temperature be higher or lower with a multigrade?


    In most cases, the multigrade oil will run cooler. For a hot-running engine, like turbocharged, high performance or aerobatic aircraft engines, this is good, but for a cool-running engine it can be a disadvantage. If the engine runs too cool, it can't boil off excess moisture and unburned fuel, so there can be a tendency to form acid buildup. For cooler-running engines, pilots should use a winterizing kit, or check with their mechanics on how to keep oil temperature up.

    ... just an idea ...

  16. #16
    RaisedByWolves's Avatar
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    He is running 15w50 aeroshell and I am running 20w50 xc

  17. #17
    Steve Pierce's Avatar
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    I think your redline is wrong, 200 degrees on a C90-8? I will look. There is no diverter plate to install the oil cooler on Chris' engine. Like someone else said, your oil pressure is good, fly it.
    Steve Pierce

    Everybody is ignorant, only on different subjects.
    Will Rogers

  18. #18
    cubdriver2's Avatar
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    Quote Originally Posted by nesincg View Post
    When we built the baffling I decided not to add the oil screen cooler as I think that just fools the temp probe that the oil is cooler.



    It's not for your oil temperature, it's to keep your sphincter muscle cool

    Glenn

  19. #19
    Steve Pierce's Avatar
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    Here is a some good testing on the blast tube. http://www.shortwingpipers.org/forum...be-Blast-Tubes
    Steve Pierce

    Everybody is ignorant, only on different subjects.
    Will Rogers

  20. #20
    tcraft128's Avatar
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    To solve the high oil temp issue in our L-2 with an 85-8, dad made a shroud that covers the front of the oil tank and 2 blast tubes that come from the nose bowl. We are here in Florida and the oil temp became a problem in the summers.
    Turning money into noise since 1996

    Our Build here


  21. #21
    Cub Builder's Avatar
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    It appears that the oil temp/pressure gauge is marked for an A series engine rather than the C-90-8. (note the oil pressure red line at 40 rather than 60 psi.) That would make the oil temp red line on the gauge (where the needle is pointing) 215. I read the large black mark to the left of the needle as 200. However the C series engine has the red line at 225, so you are actually 10 below red line. The O-200 in my other plane typically runs at 215-220 during the summer months here in NM. Been doing that for a lot of years. I have never observed any issues related to oil temp.

    -CubBuilder

  22. #22
    cubdriver2's Avatar
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    This was good for a few degree drop.





    Glenn

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