However, there are *very rare* exceptions:
* If the gasket surface is severely damaged: If the mating surfaces on the engine block or oil pan are badly scored or damaged, a very thin bead of *high-temperature* silicone specifically designed for engine applications *might* be necessary to help fill in minor imperfections. Even then, it's best to address the surface damage first if possible.
* Specific instructions from the gasket manufacturer: Always check the instructions that came with the replacement gasket. Some specialized gaskets might recommend a specific type of sealant in very specific applications.
In most cases, the best practice is to thoroughly clean the mating surfaces, install the new gasket dry, and torque the bolts to the manufacturer's specifications. This will give you the best chance of a successful, leak-free repair. Adding silicone unnecessarily can lead to a messy job and potential future problems.
