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  #1  
Old 01-04-2020, 06:41 PM
avrojockey's Avatar
avrojockey avrojockey is offline
 
Join Date: Aug 2019
Location: Appleton, WI
Posts: 423
Default Oil Change Results

Still waiting the Blackstone results for this change but wanted to share my results and get some feedback...

RV-9A
O-320-E2D
No air-oil separator on breather
20W-50XC
~30 hours on oil
Used about 1qt in that 30 hours with level kept at 6-6.5 qts.

Prior analysis showed "upper end" (Blackstone comment) corrosion which coincides with limited use while the aircraft sat for sale with limited flying last year. Jug was pulled during pre-buy to look at cam and tappets, which were normal.

I flew aircraft for 45 mins and drained oil. This was an easier than expected, but a little messy pulling screen.

Here's what I observed...
  1. Oil was remarkibly clean looking for 30 hours. With the limited burn I would guess this means the upper end is runing tight with limited blow-by.
  2. Screen caught a small amount of carbon and what seemed to been some old rubber gasket/seal material. Total...it was an immeasurable amount with no metal
  3. Oil filter - Filter media inspected and run over with strong magnet, no metal found
  4. Oil filter media washed with mineral spirts and fluid was strained in coffee filter, no metal, and only few small specks of carbon found
  5. Strong magnet was placed in jar while washing filter media to pick up anything ferrous. Only a very small amount of ferrous material was found (see picture).
  6. The ferrous material collected by the magnet was very fine...like dust, but there was a couple small flecks of metal < 0.5 mm wide and very thin.

Here's some picts filter inspection process and magnet...I want to get some opinions...Tim



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Tim Holmes
Appleton, WI
RV-9A N904DC
2022 Dues Paid

Last edited by avrojockey : 01-04-2020 at 07:52 PM.
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  #2  
Old 01-04-2020, 06:47 PM
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This is what the magnet looks like clean...

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RV-9A N904DC
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  #3  
Old 01-04-2020, 07:28 PM
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Vlad Vlad is offline
 
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Location: Utah
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Long time ago I cut an oil filter open with a hacksaw. Found similar magnetic metal specks.
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  #4  
Old 01-04-2020, 08:09 PM
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avrojockey avrojockey is offline
 
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Quote:
Originally Posted by Vlad View Post
Long time ago I cut an oil filter open with a hacksaw. Found similar magnetic metal specks.
I didn't use a hacksaw...I hope this is joke and not a reference to my 320 making metal like a hacksaw.

I have this filter cutter which works great!



..so is the fine wear metal a bad sign? The metal size is a lot finer than it looks in the picture. It's like the fine paste you get on oil pan magnet on a car engine or transmission. Actually, It was so fine when I wiped it off with a paper towel it soaked into the paper fiber and wouldn't pull out with the magnet. Here's a pict of paper towel...


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RV-9A N904DC
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Last edited by avrojockey : 01-04-2020 at 08:23 PM.
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  #5  
Old 01-04-2020, 08:27 PM
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Also...the coffee filter shows screened material but it's only fibers from cutting the oil filter media no metal was picked up when run over with the magnet.
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  #6  
Old 01-04-2020, 08:49 PM
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Quote:
Originally Posted by avrojockey View Post
I didn't use a hacksaw...I hope this is joke and not a reference to my 320 making metal like a hacksaw.

I have this filter cutter which works great!



Absolutely not Tim no intent to reference sorry if misunderstood. That particular cutter were you able to cut the filter top with nipple or you unscrewed the nipple?
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  #7  
Old 01-04-2020, 09:32 PM
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avrojockey avrojockey is offline
 
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Quote:
Originally Posted by Vlad View Post
Absolutely not Tim no intent to reference sorry if misunderstood. That particular cutter were you able to cut the filter top with nipple or you unscrewed the nipple?
I don't have the nipple on my filter...the standard -E2D filter adapter is suppose to take the 48110 filter with a nipple but I have a different filter adapter that takes the 48103 filter without a nipple.

I think this will work with the male thread. I believe they're all 3/4"-16 nipples and the slot in the middle of this filter cutter is 0.80" wide
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Last edited by avrojockey : 01-04-2020 at 09:36 PM.
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  #8  
Old 01-06-2020, 08:49 AM
freetime2247 freetime2247 is offline
 
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Tim,
Sounds like thus far you've done everything correctly. Unfortunately, a few years ago I made the dreaded mistake of not having a jug pulled durning the pre-buy & 160hrs later the engine had to be removed due to lots of metal in the filter. It was cam spalling due to limited flying over the past few years. A very expensive mistake on my part.
However, there does not appear to be much metal present in your picture.
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  #9  
Old 01-06-2020, 11:19 AM
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Tim,

A little more steel on the magnet than I like to see, but well within Lycoming guidelines. Fly it more, cut another filter.

Opinion worth what you paid for it


Quote:
Originally Posted by avrojockey View Post
[*]Oil filter media washed with mineral spirts and fluid was strained in coffee filter, no metal, and only few small specks of carbon found[*]Strong magnet was placed in jar while washing filter media to pick up anything ferrous. Only a very small amount of ferrous material was found (see picture).
Wash jar with a magnet on the lid...very interesting technique. I've been a "cut the element out with a knife and then wash it" guy, but if shaking the intact element in a jar full of solvent effectively shakes loose the filtered debris, it sure looks like a labor saver.

Gentlemen, is this a common procedure and I just missed it? Thoughts about effectiveness?
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  #10  
Old 01-06-2020, 12:25 PM
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Quote:
Originally Posted by DanH View Post
Tim,

A little more steel on the magnet than I like to see, but well within Lycoming guidelines. Fly it more, cut another filter.

Opinion worth what you paid for it

Wash jar with a magnet on the lid...very interesting technique. I've been a "cut the element out with a knife and then wash it" guy, but if shaking the intact element in a jar full of solvent effectively shakes loose the filtered debris, it sure looks like a labor saver.

Gentlemen, is this a common procedure and I just missed it? Thoughts about effectiveness?
Dan...I'm not sure if this is a common technique and maybe the amount I'm getting is from my abnormal technique. I cut open filter and visually inspected and found only a few very small (< 0.5mm) pieces of carbon. Visually the filter medium was very clean. Even after washing and letting it dry out in the sun I was only able to find a couple extra very small specks of carbon and still no metal of any variety.

When washing the filter medium in the mason jar I used a neodymium magnet, which is the strongest type of permanent magnet, and I washed it 4 times and strained fluid in at the coffee filter.

I want to reiterate that the picture of the coated magnet makes the particles look larger than they are because the magnetic field is making them stand up on one another. This wear metal is so fine I don't think the coffee filter would have even caught it...finer than graphite lubricating power.

I'll post my Blackstone results when I get them.
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