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carl(at)flyers.freeserve.
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 Posted: Sat Jul 26, 2008 6:02 am Post subject: Inspecting Rotax Oil Filters |
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I have been intending to inspect my oil filter (as per the service manual)
for some while but without the necessary servicing tool never got round to
it till today.
So I neatly opened the used oil filter that had been on my workshop shelf
only to find that it wasnt as easy as it looked. Once opened it seems that
you have to surgically remove (ie: cut out with a sharp knife) the filter
paper from the filter mechanism which is not a neat or a clean job.
Then you have to remove the oil from the filter paper without presumably
removing any of the mettallic debris which may or may not be present.
We split the corrugated filter lengthwise into approximately 4 even sections
(about 18 ins each) and blotted them with clean kitchen towel to remove the
oil (without hopefully removing any metal particles). The kitchen towel was
also inspected for metal bits before discarding it. I guess a centrifuge
would come in handy here.
Eventually we ended up with relatively oil less filter paper which we could
inspect.
Did we find metal particles - yes, definitely
Were there lots - not sure, whats a lot ???
The wording in the Rotax manual is IMHO pretty ambiguous. It says "if an
increased amount of metal particles is found, search for the cause and
correct".
INCREASED ????? ----- From what???
My point is the maintenance manual dosent help here. In fact the coverall/
disclaimer is that you need to get an expert engine person to give you a
diagnosis.
So basically its NOT a job the average aircraft owner can competently carry
out.
Are there any resources out there that might help - eg: a picture diagnosis
chart. Is this perhaps covered in one of the service bulletins in more
detail?
Any suggestions here would be greatly appreciated.
Carl Pattinson
G-LABS
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aireupora(at)sbcglobal.ne
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| Posted: Sat Jul 26, 2008 9:22 am Post subject: Inspecting Rotax Oil Filters |
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Carl, if you have some of the oil, collect it in a sample bottle and send it to a oil Analyze lab. They will give you a complete breakdown of everything that is in your oil and then you can do a trend monitoring. They will also tell you which part in the engine is breakdown. I've used the service in every engine I've own. I would do about three a year the first year the start two then one a year. It gives a great history of the engine and can be used as a selling piont. [quote][b]
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