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Oil pressure problems

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Joined
Apr 2, 2013
Messages
18
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Location
I18
Starduster too with io360 lycoming cristen inverted oil system and constant speed prop
Oil pressure on run up 75psi climb out 75psi about 10 min out oil temp 180 oil pressure drops to 62 psi cut power back oil pressure go back to 75psi land oil pressure 75psi it has always stayed at 75 psi this just started installed new pressure spring still the same thing flushed complete oil system checked all hoses checked oil cooler bypass valve every thing checks out just ordered fittings to bypass inverted valve to check next I have run out of ideas Any ideas would be greatly appreciated
 

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