Manifold gasket with different sealing beads

摘要

A manifold gasket of the invention is used for a manifold with at least three manifold holes arranged side by side. The gasket is basically formed of a metal plate for constituting the manifold gasket, which has two outer holes and at least one inner hole situated between the two outer holes. The metal plate includes two outer beads and at least one inner bead. Each outer bead surrounds each outer hole, and the inner bead surrounds the inner hole. Each outer bead forms a surface pressure less than that of the inner bead when the manifold gasket is compressed with a predetermined constant torque. Therefore, the outer bead has compressibility more than that of the inner bead to absorb deformation of the manifold when it is heated. The gasket can securely seal around the manifold holes.