How do you replace valve cover gaskets on 1998 Mazda millenia?

To replace the valve cover gaskets on a 1998 Mazda Millenia, first ensure the engine is cool and disconnect the battery. Remove any components obstructing access to the valve covers, such as the ignition coils and intake manifold if necessary. Take off the valve cover bolts using a socket wrench, carefully lift the valve covers, and remove the old gaskets. Clean the surfaces, place the new gaskets, and reassemble everything in reverse order, ensuring to torque the bolts to the manufacturer’s specifications.