Thread: Oil Leakage
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      11-07-2012, 01:53 PM   #6
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If these are cork (or cork/rubber sandwich) gaskets, keep in mind that they have natural variations, once in a while they may have a natural flaw not easily caught by visual inspection or initial run checks.
Just like you sometimes get a bad cork on a bottle of wine, despite the rigid inspection they go through. When it works, it's the best material, but only time will tell.