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Gene, Interesting......Suppose the crankcase vent was stopped up by a mouse, or bees nest.....or something not supposed to be there...... Then cranking the engine, one would - Maybe, notice a slight difficulty as the crankcase became pressurized on cranking........ then after starting and running, the engine was continually pumping the crankcase, instead of being vented to the atmosphere...... This would cause excesive pressure on all seals, oil cap gasket, and even - maybe blow oil up into the oppposite cylinder ( especially on intake stroke....)...causing a lot of oil to be blown out... BTW, this is what happens when vent tubes are routed upward, and moisture freeeses and plugs the hose...or a oil/water seperator freezes.... Now I know it wasn't cold and freezing...BUT, perhaps you did have a mouse, or bees (mud Dobber bees) plugging the vent. On flying, it was finally blown out, and all evidence lost... If all is fine now, I would asssume such a condition happened. Plugging is unusual, but Mud Dobbers or mice can really cause a problem... .(I recently had a mouse problem on my Ford windstar A/C drain hose.... Most hoses are split end contained, but the Ford comes with an open hose end. I replaced it with a closed end version and haven't had any mice in the A/C system since). Perhaps we should cover the crankcase vent, and be sure to remove cover on pre-flight. Fly Safe -Have Fun REgards, Harry Francis Blacksburg, VA N93530 ================================================================== TO UNSUBSCRIBE go to: http://ercoupers.com/lists.htm
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