When ever you change the oil make sure you clean the strainer basket on the bottom of the engine case and replace these gaskets. two are required.
Known as: gasket / gasket oil drain lid
All 356/912 engines have a steel plug in the bottom of the engine case to drain the oil. This plug has metric tapered threads and no seal ring is needed.
Oil drain plug copper washer for Boxster. Measures 18x24mm. Oil drain plugs use soft metals such as aluminum or copper to create a good seal. In order to prevent an oil drip after oil drain, it is necessary to replace the gasket. For oil drain plug gaskets, see aluminum and copper gaskets.