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10-31-2012, 02:00 PM
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Join Date: Sep 2009
Location: Roy, UT
Posts: 56
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Ferrous Metal in Oil Filter
IAW Champion AV-6R, I cut open and inspected the oil filter, Champion CH48110-1, on the O 360 A1A engine in my RV6. I picked up some metal with a magnet in the plets of the filter element. So, I went on to rinse the element out in solvent and this is what I found. Its about 1/16th of a teaspoon of fine metal granuals and slivers.
Engine has 200 hours SMOH accomplished in July of 1999. First ran in January 2010. Talked to the engine shop that overhuled the engine, consulted Mike Bush's articals, as many AP/IAs as I could find, local experts, and Lycoming SBs.
Responses range from "that's a lot of metal" to "check it again in 10 hours."
Most likely cause "cam or lifters."
I'll update the thread when I recheck the filter.
Last edited by Kwright : 11-02-2012 at 11:18 AM.
Reason: To correct Champion reference and spelling
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10-31-2012, 02:07 PM
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Join Date: Aug 2008
Location: Sandy Valley,Nevada 3L2
Posts: 151
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are you using Marvel Mystery Oil?
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RV6A, RV7, RV6 Wing
Living with my 6A at 3L2 near Las Vegas
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10-31-2012, 02:15 PM
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Join Date: Jan 2005
Location: 57AZ - NW Tucson area
Posts: 10,011
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Lycoming gets worried at 1/2 teaspoon, but does recommend the 10 hour r-check -
http://www.lycoming.com/support/publ...fs/SI1492D.PDF
__________________
Gil Alexander
EAA Technical Counselor, Airframe Mechanic
Half completed RV-10 QB purchased
RV-6A N61GX - finally flying
Grumman Tiger N12GA - flying
La Cholla Airpark (57AZ) Tucson AZ
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10-31-2012, 02:15 PM
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Join Date: Sep 2009
Location: Roy, UT
Posts: 56
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Additives
Nope. No oil additives. Seems there is a lot of controversy one the use of oil additives with the exception of Cam Guard.
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10-31-2012, 02:20 PM
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Join Date: Jun 2006
Location: 8I3
Posts: 3,564
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200 hours over 13 years is ripe for the conditions that cause spalled tappets. I would say you will see this continue so I would pull a cylinder and evaluate.
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Please don't PM me! Email only!
Bob Japundza CFI A&PIA
N9187P PA-24-260B Comanche, flying
N678X F1 Rocket, under const.
N244BJ RV-6 "victim of SNF tornado" 1200+ hrs, rebuilding
N8155F C150 flying
N7925P PA-24-250 Comanche, restoring
Not a thing I own is stock.
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10-31-2012, 02:31 PM
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Join Date: Sep 2009
Location: Roy, UT
Posts: 56
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Pull a cylinder and evaluate
Yep! That's what I'm thinking. Wondering though about pullin a mag to evaluate the accessory drive gears or pulling the govenor.
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10-31-2012, 02:33 PM
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Join Date: Jun 2006
Location: 8I3
Posts: 3,564
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The best way to evaluate the accessory case components is by removing the sump and looking up. But due to the fineness of the junk in your filter I would suspect its from a tappet.
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Please don't PM me! Email only!
Bob Japundza CFI A&PIA
N9187P PA-24-260B Comanche, flying
N678X F1 Rocket, under const.
N244BJ RV-6 "victim of SNF tornado" 1200+ hrs, rebuilding
N8155F C150 flying
N7925P PA-24-250 Comanche, restoring
Not a thing I own is stock.
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10-31-2012, 02:47 PM
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Join Date: Sep 2009
Location: Roy, UT
Posts: 56
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Suspect it's from a tappet - if so then what
Tappet pitting and cam lobe mushrooming damage does seem very likely. If that is the case the next decision is weather or not to continue to run it. Run it until wear results in 1/2 teaspoon of material. Or ground the engine, split the case and inspect and repair.
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10-31-2012, 02:50 PM
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Join Date: Jun 2006
Location: 8I3
Posts: 3,564
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The difference between now and waiting is the possibility of trashing parts that may be repairable at this point. The cam possibly could be ok at this point in time but if you let it go on you're more likely to damage it.
__________________
Please don't PM me! Email only!
Bob Japundza CFI A&PIA
N9187P PA-24-260B Comanche, flying
N678X F1 Rocket, under const.
N244BJ RV-6 "victim of SNF tornado" 1200+ hrs, rebuilding
N8155F C150 flying
N7925P PA-24-250 Comanche, restoring
Not a thing I own is stock.
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11-01-2012, 05:48 AM
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Join Date: Aug 2005
Location: Dallas/Ft Worth, TX
Posts: 5,687
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Failure is imminent, might as well bite the bullet now and tear it down, and like rocketbob said, its only going to make things worse the longer you run it.
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Walt Aronow, DFW, TX (52F)
EXP Aircraft Services LLC
Specializing in RV Condition Inspections, Maintenance, Avionics Upgrades
Dynamic Prop Balancing, Pitot-Static Altmeter/Transponder Certification
FAA Certified Repair Station, AP/IA/FCC GROL, EAA Technical Counselor
Authorized Garmin G3X Dealer/Installer
RV7A built 2004, 1700+ hrs, New Titan IO-370, Bendix Mags
Website: ExpAircraft.com, Email: walt@expaircraft.com, Cell: 972-746-5154
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