I am ready!

[A26B]

Originally Posted by Dynomite

Say......after visiting the Corvette Babes section, studying Jeff's Avatar again and doing some more thinking........are you saying that your "O" ring (oil pickup for 91' Z) is thicker than OEM with greater compression and resulting greater sealing?

Yes it is. Note in the drawing that the o-ring I specify, has a cross-section (thickness) of 0.157" and the OEM o-ring is 0.117". You are absolutely correct that the result is "greater compression" ( I prefer to call it proper compression) but the results would be increased differential pressure sealing capability. The stack height of the o-ring groove depth plus the compressed gasket thickness is only 0.004" less than the OEM o-ring cross section (thickness), putting only 0.004" compression on the o-ring, the same amount as an ordinary sheet of copy paper is thick.