Cover with a device for securing the sealing forces

The casing cover (1) has a peripheral edge (2) that is profiled to receive an elastomer seal (3). An axial extension (7) is oriented in the direction of the engine block and is disposed at an inner portion of the edge of the casing cover. The extension is positioned to project axially beyond the edge surface of the casing cover. The extension extends beyond the sealing surface on the engine block when installed, to correctly position the casing cover on the engine block.