A couple of left field ideas:
Is the engine running too lean? Lean engines run hotter right?
I have a mono classic & UL and don't get those temps and I need to partially
blank
the oil cooler in the winter. 2 summers ago I went through the LAA new VP
prop schedule which if I remember correctly calls for a 5 minute WOT climb and
temps were OK.
Air lock in either the water or oil cooler circuits? (I remember needing to
bleed
the water cooling rad through a small hole in the inlet/outlet pipe.
Agree that once temps get high it takes longer for the oil to cool than the
water.
I agree with the principal of checking the simple stuff 1st. The alternatives
tend
to be expensive and time consuming!
Hope that helps?
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