In our first episode,    • Porsche 1976 3liter Turbo Trouble Too  , we looked at the engine from the outside. Now, we dive in to split the engine case.
This engine, like many, has had work done over its lifetime. There is one spot that is ok for silicone on Porsche. You can use silver silicone in the engine Technical Service Bulletin 8911, which we show here:    • Porsche Technical Bulletin 8911 Case ...  .
Other than that, no silicone in an air-cooled Porsche engine. Please!