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The fellow who bought my last ES
is not happy with the oil temp's he's been seeing lately, particularly on
climb-out. (This is with the normally aspirated IO-550-N.) The
oil temp seems to pop up to about 220 degrees, which he thinks is too
high. In cruise, it only comes back to about 195. He's already
jettisoned the door on the oil cooler, but that didn't make any
difference. I know there are quite a few ES drivers who monitor this list,
so how about some feedback on two questions;
(1) Are these oil
temperatures a problem? (Redline is 240, but 220 does seem high,
no?)
(2) Any suggestions for
getting them down?
We've talked about obvious
things like checking the baffling for tightness. His cylinder head temp's
all seem OK. I think he's considering an after-market, add-on oil cooler,
but that seems like an extreme solution. Ducting more air into the oil
cooler box would create other problems, like ducting it from someplace,
increased cooling drag, and the possibility of robbing cooling air from
somewhere else.
FYI, on another subject, he's
also having trouble with the blade seals on the MT prop, which have been leaking
grease. MT told him they "didn't do it that way any more," but still want
to charge him $600 for a prop with only about 150 hours on it. This is to
remedy what was obviously a design flaw, which they have corrected. On
that same prop, the spinner I got with it was badly off-center, and the whole
assembly had to be replaced. The factory did send me a new one, but I was
still out of pocket to have a prop shop change it out and re-balance it (total
about $350). Seems like MT warranty back-up ain't all it should
be.
Jim Cameron
Legacy in progress
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