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Old 06-30-2008, 09:58 PM   #5
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Member#: 14141
Join Date: Jan 2002
Location: [email protected] @ 5800 ft on 13T
2002 Impreza WRX


A dry sump pulls a vacuum on the oil pan and pumps the oil and air into a holding tank where it has a chance to become de-aerated, then it pumps clean oil back to the engine.

They use several suction pump stages pulling oil from multiple locations in the engine and taking it all back to the surge tank.

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