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Thread: engine preservative oil choice---

  1. #1

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    Default engine preservative oil choice---

    The parts plane I just got has a new looking O-320. But appears to have no oil inside. None showing on dipstick---
    It has the regular spark plugs in it----

    With the idea that it wont be run for a while--- shouldnt it have oil in it and be rotated (plugs loosened)
    once a week or so more or less to keep all the internals oil coated ?

    I was thinking of using ATF since it is highly anti corrosive---- but I remember there is some special pickleing oil that it used and they fill it completely up to overflowing. But I just want a normal amount to keep an oil film on the internals. Is the "outboard fogging oil" used in outboards useful for this at all ?
    Like to figure out how to spray the cam lobes somehow---- since they are far from the pan---

    Tim

  2. #2
    Administrator Steve Pierce's Avatar
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    Default Re: engine preservative oil choice---

    I would try and keep it in a climate control space, cover exhaust ports, fill with preservative oil or double Camguard and rotate the engine to get oil on everything (do not rotate the crankshaft) and install dehydrator plugs. I have a plate bolted to an automotive engine stand and mount the engine on it's mount on the plate and it can be rotated periodically.

    https://www.aircraftspruce.com/catal...?clickkey=6338

    https://www.aircraftspruce.com/catal...clickkey=25736

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    RRHall's Avatar
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    Default Re: engine preservative oil choice---

    I had an O-200 I had preserved and every so often I would push oil through it using a garden sprayer attached to a hose through the oil pressure sensor port. I figured that way I coated all the bearings and sprayed some oil around the inside and up to the valve train. I could get it up to 50 psi.

  4. #4
    Jim's Avatar
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    Default Re: engine preservative oil choice---

    Hi,

    I've often heard moving the crankshaft will actually wipe the oil off the cylinders.

  5. #5
    CamTom12's Avatar
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    Default Re: engine preservative oil choice---

    Semi-related question - if you sealed the fill port and the breather, could you store a lycoming upside down to keep the cam in an oil bath?

    Just a random thought I had while reading this thread.

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    Default Re: engine preservative oil choice---


  7. #7
    Administrator Steve Pierce's Avatar
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    Default Re: engine preservative oil choice---

    Quote Originally Posted by CamTom12 View Post
    Semi-related question - if you sealed the fill port and the breather, could you store a lycoming upside down to keep the cam in an oil bath?

    Just a random thought I had while reading this thread.
    Yes, it will still leak but easier to clean up oil drips than replace rusted parts. During the fuselage rebuild on my Da's Clipper we rotated the engine upright to upside down and back ever so often.

  8. #8

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    Default Re: engine preservative oil choice---

    what if I got a new insecticide bug sprayer---- and hooked it up as a pressure pre-oiler so I could pressureize the oil
    system without having to move the crank on a possibly dry engine----------- do that several times on successive days---
    then try to rotate the crank with the plugs out and the cylinders spray oiled while under oil pressure. Then if that goes OK---then fill it with the phillips and invert about twice or 3 times a month ?

    Im not all that ok with letting the rings sit in the same spot that they may have been in for several years or more all ready.

    PO said he had it for about 2 years and it never had oil in it since he got it and he did not turn it.
    He said it was a crated "mystery engine" that was supposed to have been overhauled about 20 years ago....
    it looks visualy like that could be true----

    Tim

    PS--- will the crank oil ruin the dessicant in the dehydrator plugs If I invert the engine ?
    Im assuming jyou only keep it inverted for a short time--- so the oil doesnt have time to seep past the rings--- and fill up the dessicators--- (but it does look like you can clean and refill them when the silica gel gets water loaded)
    Last edited by tim bandy; 02-25-2022 at 01:37 PM.

  9. #9
    RRHall's Avatar
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    Default Re: engine preservative oil choice---

    If you are inverting it I would put regular plugs in position and not desiccant plugs for the now bottom plugs. Some oil will leak past the rings on at least some of the cylinders. You might think about pulling one or two cylinders and taking a look at the cam lobes. If they are caked with rust you are already too late.

  10. #10

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    Default Re: engine preservative oil choice---

    ordering a case (4 gallons) of the phillips 66 antirust oil. The cylinders look good- the area under the rocker boxes look good--- no sign of any rust---- everything looks operating room clean---

    This engine came with no logbook. Is there a set perscription (reg) or is it up to the IA that is examining the particular engine as to how deep of an inspection needs to go ? (like inspecting the cam lobe surfaces by sliding back 1 jug at a time--)

    Tim

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