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Old 04-03-2019, 09:03 AM
fl9500's Avatar
fl9500 fl9500 is offline
Join Date: Apr 2013
Location: Hannover Germany
Posts: 59
Default Metal in Oil Filter

after my last Oil-change, I found more than normal? magnetic metal in my Oil Filter. Lycoming O360, ~1200 Hours. ~7month and 40hours after last Oilchange.
For the first time I used CAMGUARD.

I now want to fly it for a few hours and then check again.

Any tips what to do next ?


PH-CRJ RV6A at EDVM, Germany

Last edited by fl9500 : 04-16-2019 at 10:25 AM.
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Old 04-03-2019, 10:07 AM
BobRv4 BobRv4 is offline
Join Date: Nov 2012
Location: Gilbert, AZ
Posts: 142
Default Pull a jug

I would think the cam is getting ate up. Pull a cyl and check cam.
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Old 04-03-2019, 10:28 AM
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JonJay JonJay is offline
Join Date: Jan 2007
Location: Battleground
Posts: 4,348

Put your magnet in a plastic bag next time so you can easily separate the metal from the magnet. The magnet works fine through a thin layer of plastic. Typically you want to measure how much metal is there and start trending it, although it appears to be more than enough to be concerned and it is a “new” event, also concerning.
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Old 04-03-2019, 11:19 AM
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Jpm757 Jpm757 is offline
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Most logical source of this in an infrequently flown Lycoming would be the lifters.
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Last edited by Jpm757 : 04-03-2019 at 11:22 AM. Reason: Sp
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Old 04-03-2019, 12:17 PM
rdrcrmatt rdrcrmatt is offline
Join Date: Oct 2014
Location: Milwaukee, WI
Posts: 312

Send the oil out for analysis.

Lycoming's SB for metal in the oil is pretty clear. New filter, new oil, run it for a little and check again.

Start reading at page 8.
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Old 04-03-2019, 07:18 PM
titanhank titanhank is offline
Join Date: Aug 2007
Location: Friendswood, Tx
Posts: 476

Pull a cylinder on each side and inspect the cam now before the metal has embedded in your piston skirts and ruined the jugs. Hopefully you have caught it in time. I just rebuilt my engine myself with new jugs. Cost me $20k, but my crank, cam and lifters all red tagged. I bet you have a few lifter that look like this.
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Old 04-03-2019, 11:32 PM
johnf_1 johnf_1 is offline
Join Date: Nov 2012
Location: santa rosa
Posts: 75
Default Tear down

Sorry, I do not know of anything benign that generates that much ferrous metal between oil changes. My guess: lifters/cam/oil pump gears....but nothing that is good or getting better. Good news: engines are easy to disassemble and re-assemble....had a similar event in 1994 (cam/lifters), and flying behind the re-build, John
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Old 04-04-2019, 06:53 AM
mahlon_r mahlon_r is offline
Join Date: Jan 2005
Posts: 1,060

My thoughts are to ground the aircraft until the source and remedy is determined. That is way, way to much steel in the filter from one oil change interval to ignore or to fly and see. Granted it looks as though it might be a cam lobe, tappet face spalling but maybe not. It's sizable STEEL! not fine rust scraped off something. Steel chips of that size means, if it isn't a cam lobe, something very structural to the engine or its operation is wearing and shedding metal at a very, very abnormal rate. Trust me, its not going to go away and it will increase in severity the more you operate the engine. If it is a cam lobe, operating the engine further will only increase the risk of unrepairable damage to the crankshaft, pistons, oil pump etc. Time to ground that aircraft before you do more damage to the engine and possibly to your self or your aircraft. There is no upside to continue operating the engine.
Good Luck,
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Last edited by mahlon_r : 04-04-2019 at 08:35 AM.
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Old 04-04-2019, 07:08 AM
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Walt Walt is online now
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Listen to Mahlon, he knows what he's talking about!
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Old 04-04-2019, 08:45 AM
moosepileit moosepileit is offline
Join Date: Dec 2010
Location: Louisville, KY
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Please post any suction screen findings when removal starts. Sorry for the downtime and expense.

Thank you for weighing in, Mahlon!
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