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IO-540 Low Oil Pressure at Idle

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Joined
Apr 9, 2017
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Hello all,
Recently installed an overhauled IO-540 engine on my E model aztec. After flying and the oil gets warm, (about 190-200°C)....right engine oil pressure drops rather low around the 900 RPM neighborhood, and the prop feathers. My maintenance shop removed the oil pressure relief valve and found no dirt or signs of blockages.
On the left engine, with the same oil temp values, I'm seeing steady oil pressure at 40 PSI, idling at 600 RPM with no issue of the prop going into feather.
Any ideas as to what may be causing this issue?


Tailwinds and smooth landings! ✈
 

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