Lincoln BB5Z-5E212-D Catalytic Converter

For four-cylinder engines, raise the vehicle and place on jackstands. Disconnect the downstream oxygen sensor on the catalyst. Remove the sensor and loosen the catalyst's front clamp fasteners. Remove the nuts and bolts securing the catalyst to the exhaust pipe. Remove the catalytic converter and old gasket. Install in reverse order with a new gasket and fasteners. For V6 engines, raise the vehicle and remove the engine under-cover. Disconnect both Oxygen Sensor and remove. If a heat shield is present, remove it and its bracket. Remove the fasteners securing the catalyst to the exhaust manifold and pipe. Pull down the exhaust pipe to clear the catalyst. Remove the catalyst and old gaskets. Install in reverse order with new gaskets.