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Don G
Joined: 10 Jan 2006
Posts: 156
Location: Central Illinois
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 Posted: Tue Jun 12, 2007 5:10 pm Post subject: 912 lost some oil??? |
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Yesterday, after getting N85KF's annual signed off by my A&P, I was able to finally get into the air with my new bird. Flew great...much more nimble than I thought they were these speedsters! Enjoyed an hour of exploreing its capabilities. This might even be an understatement as I was 45 minutes or so in to my joyride, and a local bud with a Stearman appeared off my wing, on an intersecting course. Well, boys being boys..we tangled for 10 minutes or so...If only I would have had a gunsite..
Anyway...upon declareing a gentlemanly draw...we went our seperate ways and I looked down for a engine scan...rut roh...Oil temps high...real high..like 280F...water fine at 220 and oil pressure down to 30. hmmm pulled back on the throttle quickly to 4400 and stared at that oil temp guage for 5 minutes...maybe more..but my stareing didnt help. The Oil temp would not change. another couple of minutes and I am back in the pattern at homeplate. Landed uneventfully and taxi'd up to my hangar.
Temp still up. Sat there at 2500 rpms for a min or so and no change.
SHut it down. Got out and I see Oil all overt he left gear and step...arghhh..
Pulled off the cowl and it looks like it came from the TOP of the oil tank. Oil all over the firewall and a puddle on the rim of the tank top. Not able to determine just where it cam from...maybe either from a leaky overflow hose clamp or from under the tank cap we are thinking?...the 2 hex fittings on in and out lines are not really suspect...dry and clean.
By now I have a crowd...I wipe it down and get extra eyes and start it up with an observer on each side...me in the pit...temp now down to 240....oil pressure up to 35 , 38 or so. run it up to 3500 and my observers tell me they see nothing...down around 2400 for a few minutes....temp continueing to drop...but no leaks.
OK....this is my very first experience with a 912. I am no a novice with engines..they are my profession...but I know enough to no I can never know enough..
Somebody with 912 experience speculate what the Heck happened!!!!
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Don G.
Central Illinois
Kitfox IV Speedster
Luscombe 8A
RV9A |
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Don G
Joined: 10 Jan 2006
Posts: 156
Location: Central Illinois
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| Posted: Tue Jun 12, 2007 5:12 pm Post subject: Re: 912 lost some oil??? |
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One more thing, oil level check after landing shows oil down to the lower mark on the stick, when flight began, it was dead in the middle. so, however much that is is what I lost.
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Don G.
Central Illinois
Kitfox IV Speedster
Luscombe 8A
RV9A |
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wingnut
Joined: 11 Jan 2006
Posts: 356
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| Posted: Tue Jun 12, 2007 6:57 pm Post subject: Re: 912 lost some oil??? |
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Sounds like the Stearman won.
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Luis Rodriguez
Model IV 1200
Rotax 912UL
Flying Weekly
Laurens, SC (34A) |
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andynfultz(at)bellsouth.n
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| Posted: Tue Jun 12, 2007 8:07 pm Post subject: 912 lost some oil??? |
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I can't help it. I just had to laugh at that one....
--
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kitfoxmike
Joined: 05 Dec 2006
Posts: 373
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| Posted: Wed Jun 13, 2007 5:26 am Post subject: Re: 912 lost some oil??? |
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When I changed to the new stick I had the same type of issue, what I did to help is put a loop at the top of the hose for the vent, loop it up twards the top cowl, then wire tie it there and then down. No more leak on the vent. I also been experimenting with oil and I find the Amzoil motorcycle oil to be a very good oil. No foaming.
Speaking on leaks. I have a leak on my 912 and I swear it was leaking out the front seal on the drive unit up front. Yesterday I put dye in the oil and flew it for about an hour. Then I used my black light and found the oil cooler was the culprit. Leaking right at one of the seams, the prop hit it and threw it into the seal for the front shaft or flange for the prop. So if you can do it, put in dye and check it the right way.
One last thing, new engine, higher oil temps until broke in. 280 is on the top side for high engine temp. They say not to go over this. So if your guage is correct, you where still ok.
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