--> Europa-List message posted by: "Davidcripps" <dpc@knightonweb.com>
As part of recent work replacing all oil and fuel lines in my Europa Classic
Trigear 912UL, I added firesleeve to both the new fuel and oil lines. In
addition I have added heat-reflective silver foil tube to the oil lines. This
was done since some significant deterioration of the exterior of the previously
uninsulated/unsleeved oil lines had been seen where the oil lines passed rather
close to parts of the exhaust (unavoidable in the tight confines of a Classic!)
While carrying out this work I also tried to deal with the previously seen
'high oil temperature in climb issue', by silicone sealing the oil cooler to
the back of the port radiator, in order to ensure that more air went through
the oil cooler and didn't leak around it.
If anything, high oil temperatures in the climb have got worse since all these
changes, requiring even more careful climb management, using multiple steps.
It's manageable, but a bit of a pain, and that's in the not-too-hot UK climate.
Oil temperatures stabilise around 115C once settled in the cruise, and water
temps are completely fine, in both climb and cruise.
Has the expected oil-cooling benefit of silicone sealing the oil cooler to the
radiator been completely negated by the added insulation effect of the
firesleeve/silver foil tube on the oil lines? I'm wondering how much oil
cooling depends on radiation from the oil lines themselves? Does anyone have
any experiences of the impact on temps of adding firesleeve to oil lines?
My next planned step is to try to make a better seal of the port radiator to
the cowl (not quite sure how to do this) and possibly add spacers to the bottom
edge of the lower cowl to increase exit area. From reading the many useful
postings on cooling issues, these would seem to help, but should I take off the
oil hose firesleeve instead/as well? I would welcome any thoughts, ideas and
comments!
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=511385#511385
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