Everyone keep in mind that for the lip seal the "tip" test is not the final say in leakage. We have seen many engines drip on the tip test and not leak under use. This is because oil can migrate through the serrations in a static situation. The oil slinger and angle of the serrations fling oil away from the seal while running. In addition, the lip seal has smaller helical lips on the primary lip that actually "screw" the oil back into the engine while it is running. In the 2009 seal revision we made these less prominent to help the seal in a static situation, but bottom line is an engine can leak in tip test conditions and be leak free in real life conditions.
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Wade Congdon
BOP Engineering
Hi-Performance Specialty Parts for Buick, Olds, and Pontiac
www.bopengineering.com
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