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  #1  
Old 10-31-2012, 03:00 PM
Kwright's Avatar
Kwright Kwright is offline
 
Join Date: Sep 2009
Location: Roy, UT
Posts: 61
Default 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 12:18 PM. Reason: To correct Champion reference and spelling
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  #2  
Old 10-31-2012, 03:07 PM
agough277 agough277 is offline
 
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are you using Marvel Mystery Oil?
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  #3  
Old 10-31-2012, 03:15 PM
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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
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  #4  
Old 10-31-2012, 03:15 PM
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Kwright Kwright is offline
 
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Default 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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  #5  
Old 10-31-2012, 03:20 PM
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rocketbob rocketbob is offline
 
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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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N9187P PA-24-260B Comanche, flying
N678X F1 Rocket, under const.
N244BJ RV-6 "victim of SNF tornado" 1200+ hrs, rebuilding
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  #6  
Old 10-31-2012, 03:31 PM
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Kwright Kwright is offline
 
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Default 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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  #7  
Old 10-31-2012, 03:33 PM
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rocketbob rocketbob is offline
 
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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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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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  #8  
Old 10-31-2012, 03:47 PM
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Kwright Kwright is offline
 
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Default 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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  #9  
Old 10-31-2012, 03:50 PM
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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.
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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  
Old 11-01-2012, 06:48 AM
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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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