Copper in oil analysis ?

Being in the UK does have problems.

http://www.lycoming.textron.com/main...tUs/index.html

http://www.lycoming.textron.com/main...ort/index.html

[PDF] The Textron Lycoming 540 engine is the strongest, most
reliable six ... File Format: PDF/Adobe Acrobat - View as
HTML
laboratory should be used for all samples. It is
critical to take. the oil sample in the same manner for each
check. The results of. the oil analysis should ...
http://www.lycoming.textron.com/supp...ips/SSP400.pdf
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Lycoming a Textron Company - Oil Analysis Oil analysis is
not new, but it came late to general aviation as a
maintenance tool. The object is to examine oil samples from
an engine, and break down the ...
http://www.lycoming.textron.com/supp...lAnalysis.html
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Lycoming a Textron Company - Suggestions if Metal is Found
in the ... The metal may have just been dislodged from some
hiding place in the oil cooler ... NOTE: Metal samples for
analysis can only by accepted if the engine from ...
http://www.lycoming.textron.com/supp...ionsMetal.html
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[PDF] SERVICE BULLETIN File Format: PDF/Adobe Acrobat - View
as HTML
Change oil at 10-hour intervals until new connecting
rod ... sample to the attention of the Lycoming Service
Department, 652 Oliver Street, Williamsport, ...
http://www.lycoming.textron.com/supp...tins/SB561.pdf
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"Peter" wrote in message
...
|
| "Jim Macklin" wrote
|
| The different copper alloys used can allow determination
of
| what part is contributing the metal, since different
alloys
| are used for different parts. Contract Lycoming and have
| them look at your results, they can give the best answer.
|
| Unfortunately this isn't easy. No email or fax number of
their
| website. I was going to call them and extract the fax
number (I am in
| the UK) but didn't bother. I emailed the data to two
engineering
| contacts at Lyco's UK main disti, who did not reply...
nice cust
| service in this business

The engine's main bearings have copper in them. The bearing
is a steel shell, electroplated with copper, and coated with a lead/tin
(and sometimes antimony) mix that forms the actual bearing surface.
It's intentionally soft so that abrasive contaminants are absorbed into
it to keep them away from the journal as much as possible.
Seeing that the lead and tin (Pb and Sn) counts were also up at
the same time as the copper, I'd wonder if there's a main bearing
giving trouble.
That said, the usual source for copper is either wrist pin
bearings or rocker shaft bushings. Lycoming's rocker bushings tend to
wear too easily.

Dan