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kitfoxjunky(at)decisionla
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 Posted: Wed Apr 02, 2008 6:49 am Post subject: Rotax 912S - oil in cylinder |
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Airplane has been encased in ice of late. Life in the Great White North...sigh.
Yesterday was warm so I went out to fire up the engine. Turning the prop by hand showed more resistance on one of the compression strokes. I pulled the plugs and one cylinder had oil in it...about a half a cup or so. I have seen this before when the plane sat for awhile. Oil seems to seep into the cylinders...probably because the oil tank is on the top of the engine and it syphons into the crankcase and it seeps past the rings over time. Last time it was one of the rear cylinders..but I was on wheels then. This time a front...on anphibs it sits slightly nose down.
Anyone else see this kind of thing? Hopefully so. I am hoping I do not have a ring issue or something like that.
Gary Walsh
KF IV Anphib 912S
C-GOOT
www.decisionlabs.com/kitfox
do not archive
[quote][b]
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dcsfoto
Joined: 24 Aug 2006
Posts: 120
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| Posted: Wed Apr 02, 2008 7:06 am Post subject: Re: Rotax 912S - oil in cylinder |
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the airplane dealer across from me some time ago when I got a Model 3 with a 912 uls that it is important to hand prop as this is a common problem when the oil tank is mounted high.
David Model 7/ 912S and 3/ 912
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kitfoxjunky(at)decisionla
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| Posted: Wed Apr 02, 2008 7:50 am Post subject: Rotax 912S - oil in cylinder |
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Thanks David. Makes me feel better.
Gary Walsh
KF IV Anphib 912S
C-GOOT
www.decisionlabs.com/kitfox
do not archive
--> Kitfox-List message posted by: "dcsfoto" <david(at)kelm.com>
the airplane dealer across from me some time ago when I got a Model 3 with a 912 uls that it is important to hand prop as this is a common problem when the oil tank is mounted high.
David Model 7/ 912S and 3/ 912
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=174343#174343
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-Matt Dralle, List Admin.
[quote][b]
| | - The Matronics Kitfox-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
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fredshiple(at)sbcglobal.n
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| Posted: Wed Apr 02, 2008 11:56 am Post subject: Rotax 912S - oil in cylinder |
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Gary,
I experienced the same thing on floats. No oil as tail dragger, resistance and oil in a cylinder after sitting on floats (wintertime). Like you, i remember to pull thru before starting.
Fred
[quote]Airplane has been encased in ice of late. Life in the Great White [b]
| | - The Matronics Kitfox-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
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peteohms
Joined: 31 Oct 2007
Posts: 224
Location: Leander, TX
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| Posted: Wed Apr 02, 2008 12:52 pm Post subject: Rotax 912S - oil in cylinder |
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I'm a new owner and just had main annualed by Murle Williams. I had oil in my cyl's and Murle said it was common from sitting.
Pete
Kitfox III N73BH
kitfoxjunky <kitfoxjunky(at)decisionlabs.com> wrote:
[quote]
Airplane has been encased in ice of late. Life in the Great White North...sigh.
Yesterday was warm so I went out to fire up the engine. Turning the prop by hand showed more resistance on one of the compression strokes. I pulled the plugs and one cylinder had oil in it...about a half a cup or so. I have seen this before when the plane sat for awhile. Oil seems to seep into the cylinders...probably because the oil tank is on the top of the engine and it syphons into the crankcase and it seeps [quote][b]
| | - The Matronics Kitfox-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
http://www.matronics.com/Navigator?Kitfox-List |
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_________________
Pete
Leander, TX
Kitfox III, 912ul, Grove |
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Float Flyr
Joined: 19 Jul 2006
Posts: 2704
Location: Campbellton, Newfoundland
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| Posted: Wed Apr 02, 2008 1:46 pm Post subject: Rotax 912S - oil in cylinder |
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With the radial engines, also dry sump, they used to say to wait until twelve blades (four blade prop) passed the window before turning on the mags. The phenomenon called hydraulic lock where lower cylinders can fill with oil and can actually have the cylinders blown off the engine when other cylinders fire. You are doing good... keep checking before each start.
Noel
From: owner-kitfox-list-server(at)matronics.com [mailto:owner-kitfox-list-server(at)matronics.com] On Behalf Of kitfoxjunky
Sent: Wednesday, April 02, 2008 12:17 PM
To: kitfox-list(at)matronics.com
Subject: Rotax 912S - oil in cylinder
Airplane has been encased in ice of late. Life in the Great White North...sigh.
Yesterday was warm so I went out to fire up the engine. Turning the prop by hand showed more resistance on one of the compression strokes. I pulled the plugs and one cylinder had oil in it...about a half a cup or so. I have seen this before when the plane sat for awhile. Oil seems to seep into the cylinders...probably because the oil tank is on the top of the engine and it syphons into the crankcase and it seeps past the rings over time. Last time it was one of the rear cylinders..but I was on wheels then. This time a front...on anphibs it sits slightly nose down.
Anyone else see this kind of thing? Hopefully so. I am hoping I do not have a ring issue or something like that.
Gary Walsh
KF IV Anphib 912S
C-GOOT
www.decisionlabs.com/kitfox
do not archive | Quote: | | http://www.matronics.com/Navigator?Kitfox-List |
0123456789
[quote][b]
| | - The Matronics Kitfox-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
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Noel Loveys
Kitfox III-A
Aerocet 1100 Floats |
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kerrjohna(at)comcast.net
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| Posted: Wed Apr 02, 2008 4:06 pm Post subject: Rotax 912S - oil in cylinder |
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| | - The Matronics Kitfox-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
http://www.matronics.com/Navigator?Kitfox-List |
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Catz631(at)AOL.COM
Guest
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| Posted: Thu Apr 03, 2008 4:23 am Post subject: Rotax 912S - oil in cylinder |
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Gary,
It's perfectly normal to have oil siphon from a high oil tank into the cylinders over time. My Kitfox does it all the time.It's just like a radial engine I used to have on a Waco.That is why you turn the prop thru so as to prevent a "hydraulic lock" which will do a number on your engine.
If you check your oil level without turning the prop,you can see the quantity go down on the dipstick for each day that you do not rotate the prop. Mine goes from max to below min in a week.
Nature of the beast I guess
Dick Maddux
Fox 4-1200
Rotax 912 Ul
Pensacola,Fl
Planning your summer road trip? Check out AOL Travel Guides.
[quote][b]
| | - The Matronics Kitfox-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
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kcflys
Joined: 28 Aug 2007
Posts: 33
Location: Rancho Cordova, CA
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| Posted: Thu Apr 03, 2008 4:57 am Post subject: Rotax 912S - oil in cylinder |
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Dick and all,
In addition to that, after trailering mine 1700 mi, a theory not proven, it drains faster bouncing on the trailer. A short trip to the airport could require a couple of rotations.
Keith C.
Mod IV 912
Mather (MHR) CA
[quote] ---
| | - The Matronics Kitfox-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
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Keith C.
kitfox wannabe
C-150
Rancho Cordova CA |
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