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03-03-2019, 10:30 PM
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Join Date: Mar 2015
Location: Cloverdale CA
Posts: 254
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How do you wash and oil filter?
I've seen a few posts lately about people washing and drying oil filter and and checking from metal. How exactly do you wash and dry an oil filter?
Last edited by lndwarrior : 03-03-2019 at 10:34 PM.
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03-04-2019, 12:09 AM
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Join Date: Sep 2006
Location: Windsor, California
Posts: 924
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I suspect that you are referring to the process used to cut open and inspect an oil filter's internal filtering media as part of an oil change. Remove the used oil filter, cut it open using an appropriate tool, remove and inspect the internal filtering media and then rinse the media's contents into a clean white container using gasoline or a suitable solvent. A magnet can be used to separate and detect any steel particles. Crushable black carbon deposits (aka "coffee grounds") are occasionally found. Engine manufacturers typically specify the amount and type of metal that is acceptable and how to proceed if metal is detected. The internet contains considerable information regarding this process and the metals that may be encountered.
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David Heal - Windsor, CA (near Santa Rosa)
EAA #23982 (circa 1965) - EAA Technical Counselor and Flight Advisor; CFI - A&I
RV-12 E-LSA #120496 (SV w/ AP and ADS-B 2020) - N124DH flying since March 2014 - 940+ hours (as of September 2020)! 
V AF donation through June 2021.
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03-04-2019, 12:58 AM
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Join Date: Mar 2015
Location: Cloverdale CA
Posts: 254
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Quote:
Originally Posted by DHeal
I suspect that you are referring to the process used to cut open and inspect an oil filter's internal filtering media as part of an oil change. Remove the used oil filter, cut it open using an appropriate tool, remove and inspect the internal filtering media and then rinse the media's contents into a clean white container using gasoline or a suitable solvent. A magnet can be used to separate and detect any steel particles. Crushable black carbon deposits (aka "coffee grounds") are occasionally found. Engine manufacturers typically specify the amount and type of metal that is acceptable and how to proceed if metal is detected. The internet contains considerable information regarding this process and the metals that may be encountered.
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OK, thanks! "Solvent in a bucket" was what I was looking for. Feel kind of stupid now that I know the answer... 
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03-04-2019, 01:35 AM
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Join Date: Mar 2007
Location: Sonoma County
Posts: 3,821
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Another way is to cut the length of pleats in thirds and squeeze each stack in the vise catching the oil underneath with a rag or paper towel. I have gotten the filter media so dry that I wrote the date on the media with a felt tip pen. Makes it really easy to open and inspect the folds with a magnifying glass without using any solvents.
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VAF #897 Warren Moretti
2019 =VAF= Dues PAID
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03-04-2019, 01:42 AM
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Join Date: Mar 2007
Location: Sonoma County
Posts: 3,821
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Just noticed all three posts above are from Sonoma County CA, where flying is only good 12 months out of the year...... 
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VAF #897 Warren Moretti
2019 =VAF= Dues PAID
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03-04-2019, 08:03 AM
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Join Date: Jun 2008
Location: San Diego, CA
Posts: 206
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Quote:
Originally Posted by gasman
Just noticed all three posts above are from Sonoma County CA, where flying is only good 12 months out of the year...... 
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'cept for the Fog. It is "god's country" though and I miss it. Someone needs to resurrect the runway/airport in Pope Valley. That's a really special place too!
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03-04-2019, 09:53 AM
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Join Date: Sep 2006
Location: Windsor, California
Posts: 924
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....and don't forget our infamous summer firestorms and winter deluges!
__________________
David Heal - Windsor, CA (near Santa Rosa)
EAA #23982 (circa 1965) - EAA Technical Counselor and Flight Advisor; CFI - A&I
RV-12 E-LSA #120496 (SV w/ AP and ADS-B 2020) - N124DH flying since March 2014 - 940+ hours (as of September 2020)! 
V AF donation through June 2021.
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03-04-2019, 11:14 AM
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Join Date: Feb 2008
Location: Calgary, Alberta
Posts: 1,005
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Love Santa Rosa! Dropped in there a few times in search of the perfect grape juice!
Hope you all were unscathed in that last deluge!
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Ralph
built a few RVs, rebuilt a few more, hot rodded some, & maintained/updated a bunch more
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03-04-2019, 03:58 PM
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Join Date: Jan 2007
Location: Battleground
Posts: 4,348
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Regardless of technique, pass a magnet through the pleats, and through your rinse solution, if you decide to flush the media. The type of metal I was finding in my high time 0320 was so small you could not see it, especially against the carbon. The metal was smaller than grains of sand.
I put a zip lock bag over an inspection magnet, tight, so the particles do not stay on the magnet. This way I could get an accurate measurement of the particle ?pile?.
On rebuild, one of the cam lobes wasn?t much of a lobe anymore but it never made any metal other than what looked like a fine powder.
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Smart People do Stupid things all the time. I know, I've seen me do'em.
RV6 - Builder/Flying
Bucker Jungmann
Fiat G.46 -(restoration in progress, if I have enough life left in me)
RV1 - Proud Pilot.
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03-04-2019, 04:31 PM
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Join Date: Nov 2008
Location: Shreveport, LA
Posts: 1,002
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Quote:
Originally Posted by JonJay
?.I put a zip lock bag over an inspection magnet, tight, so the particles do not stay on the magnet. This way I could get an accurate measurement of the particle ?pile?.....
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Dang, what a good idea. I hate it when those little bits of carbon/metal get stuck down in the cracks of the magnet! Thank you!
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